In 1937, he wrote the Warlimont Memorandum calling for the reorganisation of the German armed forces under one staff unit and one supreme commander. The plan was to limit the power of the high officer caste in favour of Adolf Hitler. On the basis of this memorandum, Hitler developed the Oberkommando der Wehrmacht (High command of the armed forces), with Hitler as supreme commander. Warlimont was rewarded in 1939 with a post as deputy to General Alfred Jodl. In 1938 he was promoted to colonel and became commander of the 26th Artillery Regiment.
