This study examines Romania's response to the Russian invasion of Ukraine in February 2022, analyzing its diplomatic, security, and humanitarian actions. Employing a qualitative methodology based on document analysis, the research draws on official statements from the Romanian Ministry of Foreign Affairs, NATO, the EU, and the UN, alongside academic literature and policy reports. The analytical framework focuses on Romania's strategic position, its engagement within international organizations, and the evolution of policies addressing both the war and refugee flows. Findings show that Romania pursued a multi-dimensional strategy. Militarily, it reinforced NATO's eastern flank and increased defense spending. Diplomatically, it actively participated in EU and OSCE initiatives, supported sanctions against Russia, facilitated humanitarian operations, and advocated for Ukraine's international recognition, including ratifying the EU-Ukraine Association Agreement. Humanitarian measures included establishing the Suceava Humanitarian Hub, adopting a National Plan for refugee integration, and providing extensive assistance to over three million Ukrainians entering Romania. The study concludes that Romania's response reflects the interplay between national interests, alliance commitments, and regional security imperatives. Its proactive diplomacy, military contributions, and humanitarian support have strengthened NATO's eastern flank and aided Ukraine, while long-term challenges remain in refugee integration, economic pressures, and sustaining its elevated regional role.