The territory of Ukraine is one of the most important strategic regions of the world, especially the Eurasian and Eastern European regions, which after the collapse of the Soviet Union has become a field of conflict and competition between the most important poles of global power, especially the United States and Russia. In this regard, this research aims to "examine the position of Ukraine in the global geopolitical scene" and based on the theoretical framework of the combined approach of Sir Halford Mackinder's geopolitical theory of the "Heartland of the World" and the theoretical approach of defensive realism, especially Stephen Walt's "Balance of Threat" theory, and with a descriptive and analytical method, examines the strategies of the United States and Russia to dominate Ukraine during the years 2014-2024. The findings of this study indicate that after the Orange Revolution of 2024 and the developments of the "Maidan Revolution" of 2014, Westerners seized absolute power through civil disobedience. This led to a sense of threat, increased concerns and hostility by the Russians, and ultimately the occupation of the Crimean Peninsula and a full-scale war between the two countries in 2022. As a result, the European and American fronts took over Ukraine's logistical support in confrontation with the Russians, and both countries, in their opinion, are seeking absolute dominance over Ukraine as the "key to the global heartland," that is, Eastern Europe.