What was a primary action taken by the U.S. before officially entering World War II?

Before officially entering World War II, one of the primary actions taken by the U.S. was providing aid and supplies to Allied nations. This significant step was part of the Lend-Lease Act, enacted in 1941, which allowed the U.S. to send military aid to countries fighting against Axis powers, particularly Great Britain and later the Soviet Union. The act reflected America's commitment to supporting its allies without directly engaging in combat, illustrating how the U.S. prepared itself for the possibility of joining the war while still maintaining a stance of neutrality.

The U.S. did not engage in direct military attacks against Axis powers prior to formally entering the conflict, which distinguishes this choice from the correct answer. Similarly, declaring war on Germany occurred only after the attack on Pearl Harbor in December 1941. Negotiating peace settlements with Axis allies was not a viable option, as the aggressive actions of these nations and existing hostilities made such negotiations impossible at that time. Therefore, the provision of aid and supplies effectively positioned the U.S. as a top supporter of the Allies, shaping the course of the war before formal entry.