Arch duke Franz Ferdinand who was Austrian was murdered by the black hand gang who were Serbian.
The sinking of the LUSITANIA is what first caused the U.S. to join this disastrous of all wars, and
their actions caused the start of World War 2....
Germany. Germany caused Americans to be raged, and want President Woodrow Wilson to take action in the war, but he kept neutrality for a while, but then entered the war.
Germany.
World War I, World War II, and the Cold War
One of the main causes of the extent of World War I was the alliances in Europe at the time, which brought many nations who had no stake in the original conflict into the war. Another cause of World War I was imperialism, which caused tension between European nations who were fighting over land to colonize.
Japanese attack on pearl harbor in 1941
World War 1 was caused by two terrorists. World War 2 was caused by some Fanatics.
The united nations was created after world war 2
What happened to the nations who lost world war 2?
Grmany, (Hitler) Italy, (Mussolini)and Japan. (military/government officials)
After the Second World War. It replaced the "League of Nations" which had been formed after the First World War.