First World War (World Empire)

World War I (abbreviated WWI or WW1, also referred to as the First World War) was a conflict between the Central Powers of Russia, Germany, and Austria-Hungary and the Allied Powers including the United States of America, United Kingdom, Canada, France, Qing China, the Empire of Japan, and Italy. This conflict began when Russian and German forces invaded France, in response to the Massacre at the German embassy in St. Petersburg by French criminals. The Allies were initially caught off guard by the attack, but were able to hold several key positions. The war was also sparked by the Russian invasion of Western Europe and the battles that occur in Ottawa, Tokyo, London, Paris, and Berlin.