On April 2, 1917, President Woodrow Wilson went before a joint session of Congress to request a declaration of war against Germany. On April 4, 1917, the U.S. Senate voted in support of the measure to declare war on Germany. The House concurred two days later.

Wilson cited Germany’s violation of its pledge to suspend unrestricted submarine warfare in the North Atlantic and the Mediterranean, and its attempts to entice Mexico into an alliance against the United States, as his reasons for declaring war.

To prevent an arms race that could lead to another world war, America signed a number of disarmament treaties to limit the size of naval fleets among Britain, France, Italy, Japan, and the United States. Finally, the Japanese invasion of Pearl Harbor, on December 7, 1941, brought the United States into World War II.

Following the Declaration of War on Japan on December 8, 1941, the other Axis nations of Germany and Italy declared war on the United States. Congress responded, formally declaring a state of war with Germany in this Joint Resolution on December 11, 1941.

On 11 December 1941, four days after the Japanese attack on Pearl Harbor and the United States declaration of war against the Japanese Empire, Nazi Germany declared war against the United States, in response to what was claimed to be a series of provocations by the United States government when the U.S. was still …

On December 11, 1941, Italy declared war on the United States in response to the latter’s declaration of war upon the Empire of Japan following the attack on Pearl Harbor four days earlier. Germany also declared war on the U.S. the same day.

The Japanese intended the attack as a preventive action to keep the United States Pacific Fleet from interfering with its planned military actions in Southeast Asia against overseas territories of the United Kingdom, the Netherlands, and the United States.

Article 9 of the Japanese Constitution (日本国憲法第9条, Nihonkokukenpō dai kyū-jō) is a clause in the national Constitution of Japan outlawing war as a means to settle international disputes involving the state. The article also states that, to accomplish these aims, armed forces with war potential will not be maintained.

In recent years, the JSDF has engaged in international peacekeeping operations with the United Nations….

Originally Answered: Why does the US have bases in Germany? The US military bases in Germany are a legacy of the Allied victory in World War II, the military occupation of Germany that followed and the Cold War that began almost immediately as soon as the “hot war” ended.

In 2021, China had the largest armed forces in the world by active duty military personnel, with about 2.19 active soldiers. India, the United States, North Korea, and Russia rounded out the top five largest armies respectively, each with over one million active military personnel.