There were many more than three but the three main ones are the assassination of Archduke Franz Ferdinand, the rise of Nationalism, and the building up of military and alliances.
The state begins as a family.
I hope this helps. Tell me if I'm wrong.
<span>This pose is known as the contrapposto pose</span>
The one of the reason's why the Allies allied themselves with the soviets was because they wanted to open a new front. The Soviet Front would be so massive and would force Axis's units to spread even more, and to spread resources more. Though they were already spread out.
