The causes of World War I, which began in central Europe in July 1914, included many intertwined factors, such as the conflicts and hostility of the four decades leading up to the war. Militarism, alliances, imperialism, and nationalism played major roles in the conflict as well. However, th...
2 of 2 Eastern FrontMap of European Russia (c. 1900), including Poland and Finland, from the 10th edition of theEncyclopædia Britannica. In August 1914 the Russian andAustro-Hungarian–German armiesfaced each other across a frontier that stretched over 1,000 miles (1,600 km) from the ...