Although the people during that time period thought that the war was going to end quickly, simply because it was between Austria and Serbia, the war surprisingly included many other strong countries because of nationalism especially regarding the Balkan colonies wanting to be self-governed. But meanwhile, after Austria-Hungary proclaimed war with Serbia, countries from the Triple Entente later joined into war in a matter of time. As shown in Document A: the European Alliances and nations are shown on a map. The nations then started to pick sides. Austria-Hungary and Germany formed the Central Powers and then Great Britain, Russia, and France formed the Allies. Because of all of these countries going into war, there has been a lot of competition