General Burkhalter was played by Leon Askin (born Leon Aschkenasy in Vienna) who emigrated to the US in 1940 and served the US Army Air Force in WW II as a Staff Sergeant.
Colonel Klink was played by Werner Klemperer who emigrated with his family from Cologne Germany in 1935, joined the US Army in WW II and served in Hawaii, joining the Army Special Services Unit touring the Pacific, entertaining the troops for the rest of the war.