This manuscript, which deals primarily with artillery flash and sound ranging, was prepared in 1949 by German authorities in this field. There are discussions on the mission of reconnaissance artillery, surveying, organization, the observation...
This is the private war journal of Generaloberst Franz Halder, Chief of the General Staff of the Supreme Command of the German Army (OKH), 14 August 1939 to 24 September 1942 (first entry: 7 December 1939, last entry: 9 May 1940).