In 1941, the United States entered World War II alongside the Allied forces. Identify the events that were instrumental in the United States joining this global conflict: A) The Lend-Lease Act allowed Congress to provide military aid to other countries. B) The signing of the Treaty of Versailles. C) The bombing of Pearl Harbor. D) Russia's invasion of Austria-Hungary. E) The sinking of the Lusitania, which resulted in over 100 American fatalities. F) Japan's invasion of China and the ensuing Sino-Japanese War. G) The interception of the Zimmermann Telegram by the United States.

History · College · Mon Jan 18 2021

Answered on

The primary event that led to the United States entering World War II alongside the Allied forces was:

C) The bombing of Pearl Harbor.

On December 7, 1941, the Japanese launched a surprise attack on the US Naval Base at Pearl Harbor in Hawaii. This devastating attack resulted in significant casualties and damage to the US Pacific Fleet and precipitated the United States' formal entry into World War II. On December 8, 1941, President Franklin D. Roosevelt delivered his famous "Day of Infamy" speech to Congress, and subsequently, the US declared war on Japan.

Another factor that contributed to the American entry into World War II was:

A) The Lend-Lease Act allowed Congress to provide military aid to other countries.

Before directly entering the conflict, the United States had already been assisting the Allied powers through the Lend-Lease Act, enacted in March 1941. This act allowed the US to supply military aid to any country whose defense was deemed vital to the security of the United States. While the US remained officially neutral early in the war, the Lend-Lease Act showed a clear lean towards supporting the Allies against the Axis powers.

The other options listed were either unrelated to US entry into WWII (D, B) or occurred during World War I or in the interwar period and thus did not lead directly to WWII involvement (E, G). Japan's invasion of China (F) did contribute to the rising tensions in the Pacific, but it was not the decisive event for US entry.