The evolution of the international arena indicates clearly that the state actors are competing for a better position on the New International Order. This perspective will bring political, social, economic, but also cultural and sustainable dimensions to the prospective analysis of evolutions. The invasion of Ukraine accelerated the reconfiguration of the Contemporary International System, with impact on the foresight developments of EU. The support of the European Member States to Ukraine manifested through different instruments, policies, and institutions, in several key areas: infrastructure, economic diversification, education and skill development, governance and policy, social development and inclusion, international collaboration, and resilience building. The present study will investigate the challenges for the EU’s enlargement policy in the context of the war from Ukraine, focusing on the accession process, its preparation, negotiations, and management of the process. The study ends with some recommendations regarding the building of the administrative and resilience capacity to better support the complex process of reconstruction of Ukraine.