The Policy of Alliances refers to the diplomatic strategy employed by various nations prior to World War I, where countries formed formal agreements and partnerships for mutual benefit, primarily for military support. This policy was pivotal in creating a network of alliances that contributed to the tension and competition among European powers, ultimately leading to the outbreak of the war. The most significant alliances included the Triple Alliance and the Triple Entente, which set the stage for a large-scale conflict when one member nation was threatened or attacked.