The War in Ukraine under International Law: Its Use of Force and Armed Conflict Aspects

Nearly two years have passed since the Russian aggression against Ukraine started in February 2022. However, there appears to be no prospect for a ceasefire. The long duration of this situation, which fundamentally undermines the prohibition of the use of force and flatly disregards rules on armed conflict, was unexpected. The international order thus faces a critical situation, but a calm and objective analysis is still necessary. Such a perspective is significant as it helps to maintain the rule of law in the international community over the long run, while simultaneously shedding light on possible constraints that other States have in relation to the aggressor State. This article analyzes the legal aspects of the war in Ukraine, focusing on rules concerning the prohibition of the use of force and the law of neutrality.