World War I BasicsIt was called “The Great War” and “The War to End All Wars.” World War I hadmany nicknames. It wasn’t officially known as World War I until World War IIhappened. It really doesn’t matter what we call the war. The impact it had on Europeand the world was immense. The war changed the way people thought about fighting,and about life, forever.There were two major sides that fought against each other in World War I. Oneside was called the Allies. An ally1is someone who promises to come to your aid ifsomething threatens you. The main Allies were Britain, Russia, France, and theUnited States. The Central Powers fought against the Allies. The Central Powerswere Germany, Austria-Hungary, and the Ottoman Empire. They were first called theCentral Powers because Germany and Austria-Hungary are located in CentralEurope.Most of World War I was fought in Europe. The opposing armies lined up faceto face and fought each other all along the Western Front and the Eastern Front.