Here is some of WWI and II Assassins Creed history that I found long time ago that got me started with the whole idea :3
From 1914 to 1918, Germany found itself involved in
World War I. One German general, the Templar
Erich Albert, was the target of an unnamed British Assassin during the
Christmas Truce of 1914.
[3] From 1939 to 1945, Germany was involved in
World War II, being one of the major countries involved, along with
England,
Russia, and the United States of America.
[4]
Adolf Hitler, the leader of the Nazi Party and dictator of Germany, plotted with Templars
Winston Churchill,
Joseph Stalin, and
Franklin D. Roosevelt to form a
New World Order. Through his associates, Hitler came into possession of a
Piece of Eden, and during the war, he was supposed to use it to make a clone of himself that was to be left in the bunker. However, the real Adolf Hitler was assassinated and his Piece of Eden disappeared.