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uva.nl
Amsterdam Center for International Law null

Prof. T.D. (Terry) Gill

Military law, in particular the law of military operations
Faculty of Law
Criminal Law
Visiting address
  • Nieuwe Achtergracht 166
Postal address
  • Postbus 15557
    1001 NB Amsterdam
Contact details
  • Profile

    Profile

    Terry Gill is Emeritus Professor of Military Law at the University of Amsterdam having held the chair from September 2001 until September 2020 and  was also holder of the chair in Military Law at the Netherlands Defence Academy from 2005 until July 2019. He was  also firstly Assistant and later Associate Professor of Public International Law at Utrecht University from 1985-2013. He is founder and co-director of the Research Program on the Law of Armed Conflict and Military Operations (LACMO) at the Amsterdam Centre for International Law and is convenor of the Netherlands Research Forum on the Law of Armed Conflict and Peace Operations (LACPO) in which researchers within the LACMO program and external researchers and practitioners hold periodic meetings to discuss recent developments in the relevant areas of  interest. He is also chair of the LACMO International Research Network which fosters and coordinates research cooperation in the areas of international military law and the law of armed conflict between a number of leading institutions in Europe, North America, Asia and the Pacific which are active in this field . Professor Gill is Editor in Chief of the Yearbook of International Humanitarian Law and is a member of the editorial boards of the The Military Law Review (Militair Rechtelijk Tijdschrift), the Journal of Armed Conflict & Security Law and the Journal of International Peacekeeping . He is a member of the Board of Directors of The International Society of Military Law & the Law of War and member of International Law Association, the  Netherlands Society of International Law, and of the Netherlands Military Law Society (Militair Rechtelijke Vereniging).

    He (co) teaches courses on international humanitarian law , international military operational law and the use of force at The University of Amsterdam  and is currently (co) supervisor of eight PhD candidates affiliated with ACIL and LACMO on various topics related to international military operational law, humanitarian law and the use of force. He has been a Fulbright visiting scholar at Columbia University and visiting research fellow at Cambridge University, Universidade de Coimbra, Universidad de Granada and the International Institute of Humanitarian Law in San Remo.

    He was a member of the International Group of Experts which produced the Tallinn Manual on the Application of International Law to Cyber Warfare, which was published in 2013 and which was updated in 2017 to include the application of international law to peacetime cyber activities (Tallinn 2.0 Manual on the International Law Applicable to Cyber Operations). He was chairman of the Study Group of the International Law Association which completed a report on The Conduct of Hostilities in the 21st Century  in 2017 and a senior academic advisor and co-editor/author of the Leuven Manual on the Application of International Law to Peace Operations  which was prepared under the auspices of the International Society of Military Law & the Law of War and published in December 2017. He was a member of the expert group on "Direct Participation in Hostilities" convened by the ICRC and TMC Asser Institute between 2003-2008 and has contributed to several military manuals in use by the Netherlands armed forces and policy advice reports to the Netherlands Government and Parliament on matters of public international law. Professor Gill was named "Officer in the Order of Orange Nassau" in September 2019 in recognition of his contribution to legal education and research in support of the Netherlands armed forces.

     

     

    Research

    Professor Gill's research is primarily in the areas of international law relating to the use of force and international humanitarian law and military operational law. He has published numerous articles on these topics in both Dutch and English and as director of the research program Law of Armed Conflict and Peace Operations and the research forum LACPO, coordinates research in these fields by senior researchers and PhD candidates from ACIL, Netherlands Defence Academy, TMC Asser Institute and other organizations within the context of those fora.

    Publications

    Some recent and forthcoming publications include:

    Recent

    • Gill,T.D. and Tibori Szabo, K. "Twelve Key Questions on Self-Defence against Non-State Actors-and Some Answers" 50 Israel Yearbook of Human Rights , Brill/Nijhoff,167-205 (2020)
    • Gill, T.D. and Tibori Szabo,K. "Twelve Key Questions on Self-Defense against Non-State Actors" 95 International Law Studies,  467 U.S. Naval War College (2019) https://digital-commons.usnwc.edu/ils/vol95/iss1/15/ SSN 2375-2831
    • Gill, T.D. and Tibori Szabo, K. " The Intervention in Somalia- 1992-95 in T.Ruys, O. Corten and A. Hofer, The Use of Force in International Law: A Case Based Approach, Oxford University Press, 482-494 (2018)
    • Gill,T.D. Entries on " Belligerents",State of Belligerency" , " Equality of Belligerents"  and "Peacekeeping" in N. Pons & D. Dukic The IHL Companion , Brill Publishers (2018)
    • Gill, T.D., Boothby, W., Fleck, D. and VanHeusden, A.  Leuven Manual on the International Law Applicable in Peace Operations, Cambridge University Press (2017)
    • Gill, T.D., Geiss, R and Heinsch, R. Final Report of the Study Group of the International Law Association on The Conduct of Hostilities in the 21st Century .published online on the ILA website and in 93 International Law Studies, 322 (2017) and in print in 19 Yearbook of International Humanitarian Law 2016 , TMC Asser Press/Springer Publishers, 287 (2017)
    • Gill, T.D., Van Haaster, J & Roorda, M, "Some Legal and Operational Considerations Regarding Remote Warfare" in Jens David Ohlin (ed.) Research Handbook on Remote Warfare, Edward Elgar Publishers 298 (2017)
    • M. .Schmitt ( ed.) Tallinn Manual 2.0 on the International Law Applicable to Cyber Operations Cambridge Univ.Press (2017)
    • Gill, T.D. "Classifying the Conflict in Syria" 92 International Law Studies 353 (2016)
    • Gill,T.D. "Some Considerations Concerning the Role of the Ius ad Bellum in Targeting" in P. Ducheine, M. Schmitt & F. Osinga (eds.) Targeting: The Challenges of Modern Warfare TMC Asser/Springer Press , 101 (2016)

     

    Older

    • Gill, T.D.& Fleck, D. (eds.) The Handbook of the International Law of Military Operations 2nd,ed., Oxford Univ. Press (2015)
    • Gill, T.D. "When Does Self-Defence End?" in M. Weller (ed.) The Oxford Handbook of the Use of Force in International Law, Oxford Univ. Press, 737 (2015)
    • Gill, T.D. "International Law Applied to Cyber Warfare: Precautions, Proportionality and the Notion of 'Attack' under the Humanitarian Law of Armed Conflict" in N.Tsagourias & R. Buchan (eds.) Research Handbook on International Law and Cyberspace, Edward Elgar Publishers 366 ( 2015)
    • Gill, T.D. "Some Thoughts on the Relationship between  International Humanitarian Law and International Human Rights Law: a Plea for Mutual Respect and a Common Sense Approach" in Haek, Y. & Mc Gonigle Leyh, B. The Realisation of Human Rights: When Theory Meets Practice, Intersentia Publishers .333 (2013)
    •  Gill, T.D. & Ducheine, P.A.L. "Anticipatory Self-Defense in the Cyber Context" Vol. 89, 438 International Legal Studies of the US Naval War College (2013)
    •  Schmitt, M (ed.) The Tallinn Manual on the Application of International Law to Cyber Warfare, Cambridge University Press (2013)
    • Gill,T.D., Marchand, C, Ducheine, P.A.L & Boddens Hosang, J.F.R, General Report to the 19th Congress of the International Society of Military Law & the Law of War on "Legal Interoperability and Ensuring Observance of the Law Applicable in Multinational Deployments"  Vol. 19 Review of Military Law and the Law of War 121-172 (2013)
    • Gill, T.D. "Chivalry: A  Principle of the Law of Armed Conflict?" in Mathee ,M, Toebes, B. and Brus, M, Armed Conflict and International Law: In Search of the Human Face,33 (2013)

     

    Forthcoming

    • Gill,T.D. "The Jus ad Bellum anno 2040"  in "Law of Armed Conflict in 2040" in M. Waxman et al. (eds) 6 Lieber Studies Series, OUP ( in the press for publication in 2021)
    •  Gill, T.D. " The Law of Belligerent Occupation; Disputed Territory and the Distinction between Invasion and Occupation" in A. de Guttry, G. Venturini & H. Post (eds.) The 1998-2000 War Between Ethiopia and Eritrea- An International Legal Perspctive Asser/Springer Publishers 2nd. rev. ed. in the press for publication in 2021

    Teaching

    In addition to the teaching activities referred to above, Prof. Gill is Acting Coordinator of the Specialization Program in Military Law at the University of Amsterdam and supervises numerous masters theses in the fields of international and military law.

    Contact details

    E-mail: T.D.Gill@uva.nl
    Tel: +31 (0)20 525 3937 (Wed./Thu.) / 3966 (secretary)

  • Ancilliary Activities
    • Member External Advisory Committee to the Netherlands Parliament on the Hawija Bombardment since January 2021
    • Consultant for the European Centre for Hybrid Threats, Helsinki, Finland since 2019
    • Editor in Chief Yearbook of International Humanitarian Law
    • Member International Group of Experts (Tallinn Manual on the Application of International Law to Cyber Warfare)
    • Board Member International Society of Military Law & the Law of War
    • Member of the Editorial Board Journal of Conflict and Security Law
    • Member of the Editorial Board Journal of International Peacekeeping
  • Publications

    2021

    • Gill, T. D. (2021). International humanitarian law applied to cyber-warfare: precautions, proportionality and the notion of ‘attack’ under the humanitarian law of armed conflict. In N. Tsagourias, & R. Buchan (Eds.), Research Handbook on International Law and Cyberspace (2nd ed., pp. 457-470). (Research handbooks in international law). Edward Elgar. https://doi.org/10.4337/9781789904253.00033 [details]
      • Downloads
    • Gill, T. D. (2021). The Law of Belligerent Occupation: Disputed Territory; the Distinction between Invasion and occupation. In A. de Guttry, H. H. G. Post, & G. Venturini (Eds.), The 1998–2000 Eritrea-Ethiopia War and Its Aftermath in International Legal Perspective: From the 2000 Algiers Agreements to the 2018 Peace Agreement (2nd ed., pp. 441-448). Asser Press. https://doi.org/10.1007/978-94-6265-439-6_19 [details]
    • Gill, T. D., Geiß, R., Krieger, H., & Paulussen, C. (Eds.) (2021). Yearbook of International Humanitarian Law 2019. (Yearbook of International Humanitarian Law; Vol. 22). Asser Press. https://doi.org/10.1007/978-94-6265-399-3 [details]

    2020

    2019

    2018

    • Ducheine, P., & Gill, T. (2018). From Cyber Operations to Effects: Some Targeting Issues. Militair Rechtelijk Tijdschrift, 111(3), 37-41. https://puc.overheid.nl/mrt/doc/PUC_248377_11/1/ [details]
    • Gill, T. (2018). Belligerency. In D. Djukić, & N. Pons (Eds.), The Companion to International Humanitarian Law (pp. 210-211). (International Humanitarian Law Series; Vol. 55). Leiden: Brill Nijhoff. https://doi.org/10.1163/9789004342019 [details]
    • Gill, T. (2018). Belligerents, Equality of. In D. Djukić, & N. Pons (Eds.), The Companion to International Humanitarian Law (pp. 212-214). (International Humanitarian Law Series; Vol. 55). Leiden: Brill Nijhoff. https://doi.org/10.1163/9789004342019 [details]
    • Gill, T. (2018). Belligerents. In D. Djukić, & N. Pons (Eds.), The Companion to International Humanitarian Law (pp. 211-212). (International Humanitarian Law Series; Vol. 55). Leiden: Brill Nijhoff. https://doi.org/10.1163/9789004342019 [details]
    • Gill, T. (2018). Peacekeeping. In D. Djukić, & N. Pons (Eds.), The Companion to International Humanitarian Law (pp. 550-551). (International Humanitarian Law Series; Vol. 55). Leiden: Brill Nijhoff. https://doi.org/10.1163/9789004342019 [details]
    • Gill, T. D., & Tibori-Szabó, K. (2018). The Intervention in Somalia -- 1992-95. In T. Ruys, & O. Corten (Eds.), The Use of Force in International Law: A Case Based Approach (pp. 482-494). Oxford University Press. https://doi.org/10.1093/law/9780198784357.001.0001 [details]
    • Gill, T., Geiß, R., Heinsch, R., Arimatsu, L., van den Boogaard, J., Corn, G., Cryer, R., Ducheine, P., Garraway, C., Gisel, L., Heintschel von Heinegg, W., Kleffner, J., Krieger, H., Lar, O., Marauhn, T., Nakatani, K., Olasolo Alonso, H., Pouw, E., Ronen, Y., ... Zyberi, G. (2018). Final Report ILA Study Group on the Conduct of Hostilities: The Conduct of Hostilities Under International Humanitarian Law: Challenges of 21st Century Warfare. Yearbook of International Humanitarian Law, 19 (2016), 287-336. https://doi.org/10.1007/978-94-6265-213-2 [details]

    2017

    • Gill, T. D., Fleck, D., Boothby, W. H., Vanheusden, A., Benatar, M., Jorritsma, R., Abbott, R. H., Andersen, J., Appelman, S., Baele, C., de Boer, T., Boeva, A., Breda, G., de Brouwer, A-M., Dembele, C., Ditrichová-Ochmannová, P., Ferraro, T., Heintschel von Heinegg, W., Klappe, B., ... Zwanenburg, M. (2017). Leuven Manual on the International Law Applicable to Peace Operations: prepared by an international Group of Experts at the invitation of the International Society for Military Law and the Law of War. Cambridge University Press. https://doi.org/10.1017/9781108610100 [details]
    • Gill, T. D., van Haaster, J., & Roorda, M. (2017). Some Legal and Operational Considerations regarding Remote Warfare: Drones and Cyber Warfare Revisited. In J. D. Ohlin (Ed.), Research Handbook on Remote Warfare (pp. 298-332). (Research Handbooks in International Law). Edward Elgar. https://doi.org/10.4337/9781784716998.00020 [details]
    • Schmitt, M. N., Vihul, L., Akande, D., Brown, G. D., Ducheine, P., Gill, T. D., Heintschel von Heinegg, W., Hernández, G. I., Housen-Couriel, D., Huang, Z., Jensen, E. T., Kittichaisaree, K., Kozik, A. L., Kreß, C., McCormack, T., Nakatani, K., Rona, G., Spector, P., Watts, S., & Blumbergs, B. (2017). Tallinn Manual 2.0 on the International Law Applicable to Cyber Operations: prepared by the International Groups of Experts at the Invitation of the NATO Cooperative Cyber Defence Centre of Excellence. (2 ed.) Cambridge University Press. https://doi.org/10.1017/9781316822524 [details]

    2016

    • Gill, T. D. (2016). Classifying the Conflict in Syria. International Law Studies (Naval War College), 92, 353-380. [details]
    • Gill, T. D. (2016). Some Considerations Concerning the Role of the Ius ad Bellum in Targeting. In P. A. L. Ducheine, M. N. Schmitt, & F. P. B. Osinga (Eds.), Targeting: the challenges of modern warfare (pp. 101-119). Asser Press. https://doi.org/10.1007/978-94-6265-072-5_5 [details]

    2015

    2014

    • Gill, T. D. (2014). Some thoughts on the relationship between international humanitarian law and international human rights law: a plea for mutual respect and a common sense approach. In Y. Haek, B. McGonigle Leyh, C. Burbano-Herrera, & D. Contreras-Garduño (Eds.), The realisation of human rights: when theory meets practice: studies in honour of Leo Zwaak (pp. 335-350). Cambridge-Antwerp-Portland: Intersentia. [details]

    2013

    2012

    • Ducheine, P., Voetelink, J., Stinissen, J., & Gill, T. (2012). Towards a legal framework for military cyber operations. In P. Ducheine, F. Osinga, & J. Soeters (Eds.), Cyber warfare: critical perspectives (pp. 101-128). (NL ARMS : Netherlands Annual Review of Military Studies; Vol. 2012). T.M.C. Asser Press. http://ssrn.com/abstract=2410228 [details]
    • Gill, T. D. (2012). Legal aspects of the transfer of authority in UN Peace Operations. Netherlands Yearbook of International Law, 42, 37-68. https://doi.org/10.1007/978-90-6704-849-1_2 [details]

    2010

    • Fleck, D., & Gill, T. D. (2010). Conclusions. In T. D. Gill, & D. Fleck (Eds.), The handbook of the international law of military operations (pp. 565-573). Oxford: Oxford University Press. [details]
    • Gill, T. D. (2010). Characterization and legal basis for peace operations. In T. D. Gill, & D. Fleck (Eds.), The handbook of the international law of military operations (pp. 135-142). Oxford: Oxford University Press. [details]
    • Gill, T. D. (2010). Humanitarian intervention. In T. D. Gill, & D. Fleck (Eds.), The handbook of the international law of military operations (pp. 221-227). Oxford: Oxford University Press. [details]
    • Gill, T. D. (2010). Legal basis of the right of self-defence under the UN Charter and under customary international law. In T. D. Gill, & D. Fleck (Eds.), The handbook of the international law of military operations (pp. 187-198). Oxford: Oxford University Press. [details]
    • Gill, T. D. (2010). Legal characterization and basis for enforcement operations and peace enforcement operations under the Charter. In T. D. Gill, & D. Fleck (Eds.), The handbook of the international law of military operations (pp. 81-93). Oxford: Oxford University Press. [details]
    • Gill, T. D. (2010). Legal parameters for the use of force in the context of the UN collective security system. In T. D. Gill, & D. Fleck (Eds.), The handbook of the international law of military operations (pp. 110-114). Oxford: Oxford University Press. [details]
    • Gill, T. D. (2010). Legal parameters for the use of force within the context of peace operations. In T. D. Gill, & D. Fleck (Eds.), The handbook of the international law of military operations (pp. 150). Oxford: Oxford University Press. [details]
    • Gill, T. D. (2010). Military intervention at the invitation of a government. In T. D. Gill, & D. Fleck (Eds.), The handbook of the international law of military operations (pp. 229-232). Oxford: Oxford University Press. [details]
    • Gill, T. D., & Ducheine, P. A. L. (2010). Rescue of nationals. In T. Gill, & D. Fleck (Eds.), The handbook of the international law of military operations (pp. 217-219). Oxford University Press. [details]
    • Gill, T. D., & Fleck, D. (2010). Concept and sources of the international law of military operations. In T. D. Gill, & D. Fleck (Eds.), The handbook of the international law of military operations (pp. 3-10). Oxford: Oxford University Press. [details]
    • Gill, T. D., & Fleck, D. (2010). Private contractors and security companies. In T. D. Gill, & D. Fleck (Eds.), The handbook of the international law of military operations (pp. 489-493). Oxford: Oxford University Press. [details]

    2009

    • Gill, T. D. (2009). The law of belligerent occupation: the distinction between invasion and occupation of disputed territory. In A. De Guttry, H. G. Post, & G. Venturini (Eds.), The 1998-2000 war between Eritrea and Ethiopia: an international legal perspective (pp. 365-370). T.M.C. Asser Press. [details]

    2018

    • Gill, T. D., McCormack, T., Geiß, R., Krieger, H., & Paulussen, C. (Eds.) (2018). Yearbook of International Humanitarian Law 2016. (Yearbook of International Humanitarian Law; Vol. 19). The Hague: Asser Press. https://doi.org/10.1007/978-94-6265-213-2 [details]

    2017

    • International Law Association Study Group on the Conduct of Hostilities in the 21st Century, Gill, T., Geiß, R., Arimatsu, L., van den Boogaard, J., Corn, G., Cryer, R., Ducheine, P., Garraway, C., Gisel, L., Heintschel von Heinegg, W., Kleffner, J., Krieger, H., Lar, O., Marauhn, T., Nakatani, K., Olasolo Alonso, H., Pouw, E., Ronen, Y., ... Zyberi, G. (2017). The Conduct of Hostilities and International Humanitarian Law: Challenges of 21st Century Warfare: Final Report of the Study Group of the International Law Association on the Conduct of Hostilities in the 21st Century. International Law Studies (Naval War College), 93, 322-388. https://digital-commons.usnwc.edu/ils/vol93/iss1/12/ [details]
    • Study Group on the Conduct of Hostilities in the 21st Century of the International Law Association, Gill, T., Geiß, R., Heinsch, R., Arimatsu, L., van den Boogaard, J., Corn, G., Cryer, R., Ducheine, P., Garraway, C., Gisel, L., Heintschel von Heinegg, W., Kleffner, J., Krieger, H., Lar, O., Marauhn, T., Nakatani, K., Olasolo Alonso, H., Pouw, E., ... Zyberi, G. (2017). International Law Association Study Group: The Conduct of Hostilities and International Humanitarian Law - Challenges of 21st Century Warfare: Final Report. International Law Association. https://ila.vettoreweb.com/Storage/Download.aspx?DbStorageId=3763&StorageFileGuid=11a3fc7e-d69e-4e5a-b9dd-1761da33c8ab [details]

    2016

    2015

    2014

    • Gill, T. D., Geiß, R., Heinsch, R., McCormack, T., Paulussen, C., & Dorsey, J. (Eds.) (2014). Yearbook of International Humanitarian Law. - Volume 15, 2012. The Hague: Asser Press. https://doi.org/10.1007/978-90-6704-924-5 [details]
    • Gill, T., Heinsch, R., & Geiss, R. (2014). ILA study group 'The conduct of hostilities and international humanitarian law: challenges of 21st century warfare' - Interim report. London: International Law Association. [details]

    2013

    2011

    • Ducheine, P. A. L., & Gill, T. D. (2011). De legitimering van statelijk geweldgebruik na 9/11. In F. Osinga, S. Soeters, & W. van Rossum (Eds.), Nine eleven: tien jaar later (pp. 216-234, 256-257, 280-284). Boom. [details]
    • Gill, T. D., & Fleck, D. (Eds.) (2011). The Handbook of the International Law of Military Operations (Pbk ed.). Oxford: Oxford University Press. [details]

    2010

    • Gill, T. D., & Fleck, D. (Eds.) (2010). The Handbook of the International Law of Military Operations. Oxford: Oxford University Press. [details]

    2021

    • Gill, T. D. (Author). (2021). Self-Defence against Non-State Actors: Episode 16 Jib-Jab Laws of War Podcast. Web publication/site, Jib Jab Laws of War Podcast.

    2019

    2015

    2013

    • Gill, T. D., van den Herik, L. J., Lammers, J. G., & Werner, W. G. (2013). Bewapende drones. (AIV-advies; No. 23). Den Haag: AIV/CAVV. [details]

    2011

    • Urlings, M. L. M., Barth, D. J., Duyvesteyn, I., van Ham, P., Homan, C., Plooij-van Gorsel, P. C., ... Uilenreef, A. D. (2011). Digitale oorlogvoering. (AIV-advies; No. 77). Den Haag: AIV/CAVV. [details]

    2009

    • Gill, T. D. (2009). Internationaal publiekrecht: verdieping. In P. J. J. van der Kruit (Ed.), Handboek militair recht. - 2e dr. (pp. 257-279). Breda [etc.]: Nederlandse Defensie Academie. [details]
    • Gill, T. D., & van der Kruit, P. J. J. (2009). Internationaal publiekrecht: inleiding. In P. J. J. van der Kruit (Ed.), Handboek militair recht. - 2e dr. (pp. 233-255). Breda [etc.]: Nederlandse Defensie Academie. [details]

    Award

    • Gill, T. (2019). Appointed Officer in the Order of Orange Nassau.

    Membership

    • Gill, T. D. (2009-2016). Member of the Board of Directors, International Society for Military Law and the Law of War, Brussels, Belgium.

    Talk / presentation

    • Gill, T. (speaker) (22-9-2017). The Leuven Manual on the Application of International Law to peace Operations, International Society for Military Law and the Law of War, Brussels, Belgium.
    • Gill, T. (speaker) (21-9-2017). Self Defence in Response to Attacks by Non-State Actors, International Society for Military Law and the Law of War, Brussels, Belgium.
    • Gill, T. (speaker) (11-7-2016). Expert Conference Cyber Security, Ministry of Foreign Affairs, the Netherlands.
    • Gill, T. (speaker) (18-4-2016). Relevance of International Law to Cyber Activity, United Nations Group of Governmental Experts.
    • Ducheine, P. (speaker) & Gill, T. D. (speaker) (1-4-2016). Expert opinion inzake bijdragen van de MIVD aan targeting, Commissie van Toezicht betreffende de Inlichtingen- en Veiligheidsdiensten (CTIVD).
    • Gill, T. (speaker) (5-2-2016). Tallinn Manual 2.0 Presentation to State Representatives, Hague Process: Presentation of Tallinn Manual to State Representatives, The Hague.
    • Ducheine, P. A. L. (speaker) & Gill, T. D. (speaker) (30-5-2013). Cyber Warfare and International Law - Does the Tallinn Manual Give Adequate Solutions for the Next Generation of Wars??, The Grotius Centre for International Legal Studies, The Kalshoven-Gieskes Forum on International Humanitarian Law &The International Law Association Prof. mr B, Leiden.
    • Gill, T. D. (invited speaker) (10-1-2013). Some Thoughts on the Relationship between International Humanitarian Law and Human Rights Law: A Plea for a Common Sense Approach, Conference ‘The Boundaries of the Battlefield’, organized by the International Centre for Counter Terrorism, TMC Asser Institute, The Hague.
    • Gill, T. D. (invited speaker) (26-6-2012). Anticipatory Self-Defense in Cyber Perspective, 2012 Annual Conference of the US Naval War College on 'Cyber War and International Law', Newport, Rhode Island.
    • Gill, T. D. (invited speaker), Marchand, C. (invited speaker), Ducheine, P. A. L. (invited speaker) & Boddens Hosang, J. F. R. (invited speaker) (1-5-2012). Presentation of the General Report on the Law of Self- Defence, 19th Congress of the International Society for Military Law and the Law of War, Quebec, Canada.
    • Gill, T. D. (invited speaker) (10-11-2011). Legal Framework of Peace Operations, Conference on the Law of Peace Operations organized by the International Society of Military Law, Beijing, China.

    Others

    • Ducheine, P. (examiner) & Gill, T. (examiner) (19-1-2022). Supervsion of PhD Peter Pijpers (examination).
    • Gill, T. (participant) (8-10-2021). Commemoration of the 50th Anniversary of the Chair of Military Law at the University of Amsterdam, Amsterdam (organising a conference, workshop, ...).
    • Gill, T. (consultant), Sorgdrager, W. (consultant) & Reefman, R. (consultant) (4-1-2021 - 1-12-2021). Onderzoekscommissie Wapeninzet Hawija, Ministerie van Defensie, Den Haag (consultancy).
    • Gill, T. (consultant) (1-11-2020 - 1-6-2022). Legal Consultant to the Parliamentary Investigation Commission on the Bombardment of Hawija ( Iraq), Tweede Kamer der Staten-Generaal (consultancy).
    • Gill, T. (consultant) (22-11-2019). Handbook on Maritime Hybrid Threats: 10 Scenarios and Legal Scans, European Centre of Excellence for Countering Hybrid Threats (consultancy).
    • Gill, T. (participant) (28-10-2019 - 30-10-2019). Lieber Conference on Current Trends in the Law of Armed Conflict, West Point N.Y.. The conference discussed future trends in the law governing the use of force and armed conflict on the basis of preliminary papers distributed (…) (participating in a conference, workshop, ...).
    • Ducheine, P. (examiner) & Gill, T. (examiner) (24-10-2019). Supervision of PhD Bart van den Bosch (examination).
    • Gill, T. (consultant) (19-8-2019 - 2022). Legal Consultant for Hybrid Threats to Maritime Security, European Center of Excellence for Countering Hybrid Threats (consultancy).
    • Ducheine, P. (examiner), Gill, T. (examiner) & Osinga, F. P. B. (examiner) (5-7-2019). Supervisor PhD Jelle van Haaster (examination).
    • Gill, T. (participant) (2-7-2019). Sovereignty, Non-Intervention and International Law in the Cyber Context, Royal Institute of International Relations (Chatham House), London (participating in a conference, workshop, ...).
    • Gill, T. (consultant) (1-6-2019 - 1-6-2024). Consultant on International Law Applicable to Maritime Hybrid Threats, European Centre of Excellence for Countering Hybrid Threats (consultancy).
    • Gill, T. (consultant) (6-5-2019 - 31-12-2024). Legal Consultant, European Centre of Excellence for Countering Hybrid Threats (consultancy).
    • Gill, T. (consultant) (26-4-2019 - 19-12-2019). Expert Panel on Humanitarian Intervention and Interstate Use of Force, the Netherlands' Ministry of Foreign Affairs (consultancy).
    • Gill, T. (participant) (26-11-2018 - 28-11-2018). International Law and Conflict at Sea, Newport. Member and Speaker at Expert Conference (participating in a conference, workshop, ...).
    • Gill, T. (organiser) (26-9-2018 - 27-9-2018). Launch Conference LACMO Research Network, Amsterdam. Launch Conference of the LACMO Research Network " Rise and Fall of ISIS" (organising a conference, workshop, ...).
    • Gill, T. (participant) (29-11-2017). United Nations Policing: Current Legal and Practical Challenges, Frankfurt am Main (participating in a conference, workshop, ...).
    • Gill, T. (participant) (29-8-2017). Round Table Expert Conference on International Law and Cyber Warfare, Stockholm. Roundtable Expert Conference on International Law and Cyber Warfare (participating in a conference, workshop, ...).
    • Gill, T. (participant) (19-9-2016). Meeting Group of Experts Manual on the Law of Peace Operations, Leuven (participating in a conference, workshop, ...).
    • Gill, T. (participant) (11-7-2016). Expert Conference on Cyber Security (participating in a conference, workshop, ...).
    • Gill, T. (participant) (18-3-2015). Meeting of International Group of Experts Tallinn 2.0 Manual, Tallinn. Participation in International Group of Experts Tallinn Manual 2.0 (participating in a conference, workshop, ...).
    • Gill, T. D. (other) (2014). Co-Supervision (with Paul Ducheine and Frans Osinga) of PhD thesis of Mark Roorda ('Remote Targeting and Unmanned Aerial Vehicles'), University of Amsterdam (other).
    • Gill, T. D. (other) (2014). Co-Supervision (with Paul Ducheine) of PhD thesis of Bart van den Bosch ('Law of Cyber Operations in Armed Conflict below the Threshold of Attack'), University of Amsterdam (other).
    • Gill, T. D. (other) (2014). Co-Supervision (with Eric Myjer) of PhD thesis of Maurits Gorlee (‘Export Controls and Sanctions as Instruments in Arms Control Law'), University of Amsterdam (other).
    • Gill, T. D. (other) (2013). Co-Supervision (with Paul Ducheine and Frans Osinga) of PhD thesis of Jelle Haastra ('Cyber Fighting Power'), University of Amsterdam (other).
    • Gill, T. D. (other) (2013). Supervision of completed PhD thesis of Eric Pouw ('International Human Rights Law and the Law of Armed Conflict in the Context of Counterinsurgency', defended at the University of Amsterdam, 14 November 2013), University of Amsterdam (other).
    • Gill, T. D. (other) (2012). Supervision of PhD thesis of Martin Fink ('Law of Maritime Interception'), University of Amsterdam (other).
    • Gill, T. D. (other) (2012). Co-Supervision (with Eric Myjer) of PhD thesis of Jonathan Herbach (‘International Law and Nuclear Security Governance'), University of Amsterdam (other).
    • Gill, T. D. (other) (2012). Supervision of completed PhD thesis of Joop Voetelink ('"Status of Forces": Strafrechtsmacht over militairen vanuit internationaalrechtelijk & militair-operationeelrechtelijk perspectief', defended at the University of Amsterdam, 20 September 2012), University of Amsterdam (other).
    • Gill, T. D. (other) (2010). Supervision of completed PhD thesis of Kinga Tibori Szabo ('Anticipatory action in self-defence: The law of self-defence - past, presence and future', defended at the University of Amsterdam, 24 November 2010), University of Amsterdam (other).
    • Gill, T. D. (other) (2010). Supervision of PhD thesis of Jeroen van den Boogaard ('Proportionality as a Principle of the Law of Armed Conflict and as a General Principle of International Law'), University of Amsterdam (other).
    • Gill, T. D. (other) (2009). Co-Supervision (with Jann Kleffner) of PhD thesis of Rogier Bartels ('Transnational Armed Conflict'), University of Amsterdam (other).
    • Gill, T. D. (other) (2009 - 2016). Supervision of PhD thesis of Hans Boddens Hosang ('Rules of Engagement in International Legal Perspective'), University of Amsterdam (other).
    • Gill, T. D. (other) (2009). Supervision of completed PhD thesis of Maria Nybondas-Maarschalkerweerd ('The command responsibility doctrine in international criminal law and its applicability to civilian superiors', defended at the University of Amsterdam, 25 November 2009), University of Amsterdam (other).
    • Gill, T. D. (other) (2008). Member Board of Directors, International Society for Military Law and the Law of War (other).

    2022

    2019

    2017

    • Boddens Hosang, J. F. R. (2017). Rules of engagement: Rules on the use of force as linchpin for the international law of military operations. [details]

    2013

    2012

    2010

    2008

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