Final answer:
Western nations responded to acts of aggression by Germany, Japan, and Italy in the 1930s with policies of neutrality, appeasement, and eventually full involvement in World War II after the attack on Pearl Harbor.
Step-by-step explanation:
In response to acts of aggression by Germany, Japan, and Italy in the 1930s, the western nations (U.S., Britain, France, etc.) had different approaches. The United States adopted a policy of neutrality and passed the Neutrality Acts of 1935, which banned the sale of weapons to nations at war. Britain and France initially hoped for a German alliance against the Soviets, leading to a policy of appeasement towards Hitler's aggression. Ultimately, the outbreak of World War II and the attack on Pearl Harbor caused the United States to become fully involved in the conflict.