, the invasion of Soviet Union during World War II, as depicted in a US Government study (March 1955) As Chief of Staff VIII Corps, Marcks took part in the
attack on Poland and was promoted to Chief of Staff
18th Army, serving with it during the
Battle of France. In the summer of 1940,
Franz Halder, chief of
OKH General Staff, directed Marcks to draft an initial operational plan for the invasion of the
Soviet Union. Marcks produced a report entitled "Operation Draft East". Citing the need to "protect Germany against enemy bombers", the report advocated the
A–A line as the operational objective of the invasion of "Russia" (sic). This goal was a line from
Arkhangelsk on the
Arctic Sea through
Gorky and
Rostov to the port city of
Astrakhan at the mouth of the
Volga on the
Caspian Sea. Marcks envisioned that the campaign, including the capture of Moscow and beyond, would require between nine and seventeen weeks to complete. ==Ukrainian SSR, Normandy and death==