This work's research examines the international relations of Romania after the 89' Revolution, within the changing parameters in the Romania's near shore as well the new paradigms of International Relations appeared at the end of the eighties and the dawn of the 21st century. Focusing on the 'major forces' (geopolitics, country's history...) likewise 'variable forces' (foreign policy, domestic policy, sociology...), this work identified three pillars: the powerful impact of the 'Others', an in-between situation and the complexity of Romania' borderland as well its crossroad situation. These pillars underline the Romanian international relations actions and impel the Romanian foreign policy decisions. It is pointed out that Romania's case study represented the Central and Eastern European Countries' (CEECs) path and contingencies, likewise the politico-ideological transformation of the military alliance as well the European Union enlargement strategy adaptation in the Post-Cold War Era interdependence. In addition, this work allows validating some theories in different fields as Foreign Policy Change, International Relations, Geopolitics, Interdependence... Over its history despite the geopolitical and domestic changes, Romania's main options in the international relations remained unchanged relying on system of alliance thru balancing or bandwagoning likewise International Organizations to guaranty the country' peace and freedom. In addition, from a constant in-between situation associated to a complex borderland context, the country will move regularly to a crossroad situation. Besides, after restructuring the country's internal situation, its alliances and its bilateral relations, Romania took an active role towards the Balkans and the Wider Black Sea. With its new status, Romania is becoming the 'Nato's aircraft carrier' and practically the EU's voice at the southeast European frontiers with a new role custom designed in the post-Yalta international system.