This thesis examines the European Peace Facility and more specifically how this off-      budget fund has been put into effect in Ukraine in light of the recent events of the Russian invasion of 2022.  This thesis will carry out a single case study about how the European Peace Facility (EPF) has been established in support of Ukraine since the end of February 2022. It will also analyse data that concerns the support provided by Member States to Ukraine to provide a better picture of how the EPF has been implemented in Ukraine. The topic can be deemed to be remarkably recent since the situation in Ukraine is still in rapid development. This is proved by the fact that European Union’s Council Decisions that are analysed in this dissertation are still being further amended. Moreover, the topic is relevant for the field of European Studies since it provides a preliminary study of these unprecedented matters that have had a profound impact on the EU. Theories of Intergovernmentalism and Supranationalism will be employed to analytically analyse the material.  This thesis will conclude that even though the EU bodies have had a marginal role in the implementation of the EPF, their response has been timely. The funds allocated by the decisions of the Council of the EU to support Ukraine are quite a substantial part of the whole financial reference of Facility. It is also discussed that the Member States have committed to a great extent to the support of Ukraine both in the training of Ukrainian troops through the EUMAM Ukraine and through the provision of weapons and arms to the UAF. In addition to this, the thesis draws considerations which connect the theory and the single case in question.