The crisis came after a long and difficult series of diplomatic clashes between the Great Powers (Italy, France, Germany, the British Empire, the Austria-Hungarian Empire and Russia) over European and colonial issues in the decade before 1914 that had left tensions high. In turn these diplomatic clashes can be traced to changes in the balance of power in Europe since 1867.[2] The more immediate cause for the war was tensions over territory in the Balkans. Austria-Hungary competed with Serbia and Russia for territory and influence in the region and they pulled the rest of the Great Powers into the conflict through their various alliances and treaties.
Although the chain of events unleashed by the assassination triggered the war, the war's origins go deeper, involving national politics, cultures, economics, and a complex web of alliances and counterbalances that had developed between the various European powers since 1870. Some of the most important long term or structural causes are: the growth of nationalism across Europe, unresolved territorial disputes, an intricate system of alliances, the perceived breakdown of the balance of power in Europe, [3][4], convoluted and fragmented governance, the arms races of the previous decades, previous military planning[5], imperial and colonial rivalry for wealth, power and prestige, and economic and military rivalry in industry and trade – e.g., the Pig War between Austria and Serbia. Other