The First World War became a turning point in the history of the 20th century - it was with it that the reckoning of a new historical era began. This era was marked by the deepest upheavals in all spheres of human life: bloody world wars, fratricidal revolutions, and the collapse of centuries-old empires. The history of many states would have been different if not for the conflict between the Entente and the bloc of Central Powers led by Germany, which broke out in August 1914 and ended in November 1918. In the book brought to your attention, the author, Doctor of Historical Sciences, not only summarizes the results of domestic and foreign research on the history of the First World War, analyzes the most important events associated with it, but also publishes the most interesting documentary materials unknown to the general reader.