"The Oberkommando der Wehrmacht (German: [ˈoːbɐkɔˌmando deːɐ̯ ˈveːɐ̯ˌmaxt] (listen); German: [oːkaːˈveː] (listen); abbreviated OKW; lit. 'Upper Command of the Armed forces') was the high command of the Armed forces of Nazi Germany. Created in 1938, the OKW replaced the Reich War Ministry and had nominal oversight over the Army (Heer), the Navy (Kriegsmarine), and the Air force (Luftwaffe).
Rivalry with the armed services branch commands, mainly with the Army High Command (the OKH), prevented the OKW from becoming a unified German General Staff in an effective chain of command. It did help coordinate operations between the three services. During the war, the OKW, subordinate to Adolf Hitler as Supreme Commander of the Wehrmacht, acquired more and more operational powers. By 1942, OKW had responsibility for all theatres except for the Eastern Front against the Soviet Union. However, Hitler manipulated the system in order to prevent any one command from taking a dominant role in decision making. This "divide and conquer" method helped put most military decisions in Hitler's own hands, which at times included even those affecting engagements at the battalion level." - (en.wikipedia.org 15.02.2022)
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