What were three causes of tension Europe before world war 1?

Before World War I, three key causes of tension in Europe included militarism, nationalism, and the complex system of alliances. Militarism led countries to build up their armed forces and foster a culture that glorified military power. Nationalism fueled rivalries as ethnic groups sought independence or dominance, particularly in the Balkans. Additionally, the intricate alliances, such as the Triple Alliance and the Triple Entente, created a scenario where a conflict involving one nation could quickly escalate into a larger war.