WORLD HISTORY

Detailed explanation-1: -The US entered World War I because Germany embarked on a deadly gamble. Germany sank many American merchant ships around the British Isles which prompted the American entry into the war.

Detailed explanation-2: -On December 7, 1941, following the Japanese bombing of Pearl Harbor, the United States declared war on Japan. Three days later, after Germany and Italy declared war on it, the United States became fully engaged in the Second World War.

Detailed explanation-3: -The first reason was the sinking of the ship Lusitania. The second conflict was the sending of the Zimmerman Telegram. The final cause was that German U-Boats sank several merchant ships. Due to these three leading causes, the U.S was no longer neutral in World War I.

Detailed explanation-4: -Americans were deeply divided about the European war, and involvement in the conflict would certainly disrupt Progressive reforms. In 1914, he had warned that entry into the conflict would bring an end to Progressive reform. “Every reform we have won will be lost if we go into this war, ‘’ he said.

Detailed explanation-5: -The Japanese attack on Pearl Harbor on December 7, 1941, ended the debate over American intervention in both the Pacific and European theaters of World War II. The day after the attack, Congress declared war on Imperial Japan with only a single dissenting vote.