The evolution of U.S. policy from isolation to active engagement in World War II marked a significant shift in international relations. Initially adhering to isolationism, influenced by the America First Committee and Neutrality Acts, the U.S. gradually moved towards supporting the Allies through legislation like the Lend-Lease Act. The attack on Pearl Harbor catalyzed America's full-scale war entry, leading to strategic victories in both European and Pacific theaters and establishing the U.S. as a superpower post-war.
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The United States' foreign policy of isolationism was shaped by the trauma of World War I
The United States' non-interventionist sentiment was influenced by the economic challenges of the Great Depression
The America First Committee, led by notable figures such as Charles Lindbergh, epitomized the non-interventionist sentiment in the United States
As Axis powers expanded and threatened global stability, American public opinion gradually shifted towards supporting intervention
The fall of France and the Battle of Britain highlighted the dangers posed to democracies worldwide, prompting a reevaluation of isolationist policies
Prior to entering the war, the United States provided indirect support to the Allies through increased military production and the "cash and carry" provision
The surprise attack on Pearl Harbor by Japanese forces served as the turning point for American involvement in World War II
The United States declared war on Japan and subsequently Germany and Italy, cementing its full-scale entry into the global conflict
In the aftermath of Pearl Harbor, the United States rapidly mobilized and joined its Allied partners in strategic planning
The "Europe First" strategy, adopted at the Arcadia Conference, prioritized the defeat of Nazi Germany
American forces played a crucial role in the eventual defeat of Nazi Germany through their involvement in the North African campaign, invasion of Italy, and D-Day invasion
In the Pacific, the United States pursued a strategy of "island-hopping" and achieved a critical victory at the Battle of Midway