The war diary of the Chief of the General Staff of the Ground Forces of Nazi Germany contains daily service records of Franz Halder, covering the period from 1941 to 1942. Detailed information on the implementation of the Barbarossa plan, the beginning of the war against the USSR, the battle for Moscow, the battle for Stalingrad. Halder's diary is a unique source of information about the activities of the Wehrmacht think tank, the rich material contained in it allows you to better understand the history, character, causes and consequences of many events of World War II.