Nicholas Tsagourias

About/Bio

Nicholas Tsagourias is Professor of International Law at the University of Sheffield and Director of the Sheffield Centre of International and European Law (Nicholas.Tsagourias@sheffield.ac.uk).

Recently Published

Ukranian ‘IT Army’: A Cyber Levée en Masse or Civilians Directly Participating in Hostilities?

In the days following Russia’s invasion of Ukraine, Ukraine’s Deputy Prime Minister and Minister for Digital Transformation Mykhaylo Fedorov announced in a tweet the creation of an ‘IT Army’. According to reports, as many as 400, 000 people from across the world have joined. A list of targets has been published and…

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An International Law Assessment of the Collective Self-defence Clause of the 2021 Treaty on the ‘Establishment of Strategic Partnership of Cooperation in Matters of Defence and Security’ between Greece and France

On 28 September 2021 France and Greece concluded a bilateral treaty on the ‘Establishment of Strategic Partnership of Cooperation in Matters of Defence and Security’ (see the Greek and French version here. The Treaty has not been translated yet into English). The Treaty is premised on a community of interests in matters of foreign policy, defence, and…

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Electoral Cyber Interference, Self-Determination and the Principle of Non-Intervention in Cyberspace

Introduction In recent years we have witnessed persistent attempts to interfere in elections by using cyber means. Russia’s cyber interference in the 2016 US presidential election is a prime and perhaps the most discussed example but it is not the only one; other incidents include electoral interference in the Netherlands, the UK, France and Germany…

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