1. Which of the following was the immediate cause of the United States' entry into World Wer II? Germany's invasion of Poland France's fall to Nazi troops China's fall to Axis powers Japan's bambing of Pearl Harbor

## Step 1<br />The question is asking for the immediate cause of the United States' entry into World War II. The options provided are Germany's invasion of Poland, France's fall to Nazi troops, China's fall to Axis powers, and Japan's bombing of Pearl Harbor.<br /><br />## Step 2<br />The United States initially adopted a policy of isolationism, which meant they did not want to get involved in the war. However, this changed when Japan launched a surprise attack on the U.S. naval base at Pearl Harbor in Hawaii on December 7, 1941.<br /><br />## Step 3<br />The attack on Pearl Harbor resulted in the death of more than 2,400 Americans and caused significant damage to the U.S. Pacific Fleet. This event led the U.S. to abandon its isolationist stance and declare war on Japan the following day, marking its official entry into World War II.<br /><br />## Step 4<br />The other options, such as Germany's invasion of Poland, France's fall to Nazi troops, and China's fall to Axis powers, were significant events in the lead-up to the war, but they did not directly cause the U.S. to enter the conflict.