American foreign policy is one of the important and main axes in shaping the features of the international system, as the United States of America plays a pivotal role in how to manage and confront global crises and formulate responses to them. Just as every crisis has causes and motives and has variables and factors that affect its general trends towards a specific indicator or multiple indicators, it also has results and repercussions that are reflected in the internal environment of the two parties to the crisis and in the regional and international environment. In addition, there are international actors trying to lead and manage the crisis in a way that serves their strategic goals and interests. Major crises, such as the events of September 11, 2001 and the ongoing Russian-Ukrainian war since 2014 and its escalation in 2022, show how the United States deals with international security and political challenges in a way that serves its national interests and maintains its position as a superpower. The events of the September 11 attacks may represent a turning point in American strategy, as they called for re-prioritizing national security policies through (the war on terror - preventive war), which resulted in military interventions in Afghanistan and Iraq and the consolidation of the principle of preemptive strikes. As for the Ukrainian war, it showed a shift in how to confront European security challenges,