What was the Europe first strategy adopted after the Pearl Harbor attack?

Following the attack on Pearl Harbor in December 1941, the United States and Great Britain formally adopted a "Europe first" strategy to guide their military efforts during World War II.

This strategic decision was solidified during the Arcadia Conference in Washington, D.C., held later that month between U.S. President Franklin D. Roosevelt and British Prime Minister Winston Churchill. Under this policy, the Allies prioritized the defeat of Nazi Germany as the primary objective of the war, despite the fact that the United States had been directly provoked by the Japanese attack in the Pacific.1

While the U.S. military took necessary defensive actions to contain Japanese expansion in the Pacific theater, the "Europe first" approach ensured that the bulk of Allied resources and strategic planning remained focused on the European and North African fronts until Germany was defeated.231