He next gained his own command, serving from 1943 to 1944 as Commanding Officer of the seaplane tender . Stroop spent the last months of the war in Washington, D.C., serving from 1944 to 1945 in the Navy Department as Aviation Plans Officer on the Staff of Fleet Admiral Ernest J. King, the Chief of Naval Operations and Commander in Chief, U.S. Fleet. In this capacity, Stroop attended the Yalta, Quebec, and Potsdam Conferences, later making a trip around the world to inform commands of outcome of the Yalta Conference.