Final answer:
The U.S. military plan for war, called Plan D, laid out a defensive strategy that prioritized defeating Germany and Italy first before engaging with Japan. The plan focused on defensive operations and neutralizing the Axis powers in Europe.
Step-by-step explanation:
The U.S. military plan for war, called Plan D, laid out a defensive strategy. This plan focused on defeating Germany and Italy first, adopting a defensive posture against Japan if it entered the war. The goal was to prioritize the war effort in Europe and secure victory on that front before fully engaging in the Pacific. Plan D aimed to achieve victory through defensive operations and neutralizing the Axis powers in Europe.