The Japanese attack on the US Fleet at Pearl Harbor.
The attack on Pearl Harbor by the Japanese brought the US into World War Two.
The Japanese surprise attack upon Pearl Harbor .
The bombing of Pearl Harbor on 12/7/41 by the Japanese angered the Americans. They finally had their own motivation to declare war on both Japan and Germany.
Pearl Harbor
the battle of Britain
Only one single event caused the war. The assassination of Archduke Franz Ferdinand was the immediate cause of the war. The four long term causes were Militarism, alliances, Imperialism and Nationalism.
Korea
The US was brought into World War II when the Japanese launched a surprise attack on Pearl Harbor. The attack killed many and injured even more. Also, many ships from the Pacific Fleet were destroyed or horribly damaged, some not repairable.
It brought the United States firmly into World War II on the side of the Allies ensuring the inevitable defeat of the Axis powers, Japan, Germany, and Italy.
The atomic bomb
The assassination of Archduke Ferdinand was the one event that pushed Europe over the edge and brought about World War I.
The Cuban Missile Crisis is the event that brought the world closest to a nuclear fallout.
World War II brought the end of colonialism.
It is due to the balkans problem
The Japanese attack on Pearl Harbor brought USA into the war.
World War Two.
The unprovoked attack on Pearl Harbour by the Japanese
Attack On Pearl Harbor
The event that brought the USA into WW II was the bombing of Pearl Harbor on Dec. 7th, 1941.
A nuclear war never happened. You may be thinking of the Cuban Missile Crisis when the world came very close to nuclear war.
That was the beginning for the US. The end was dropping the A-bombs.