Following the cessation of hostilities and the Allied occupation of Turkey, Rear Admiral Mark L. Bristol was sent to Istanbul as Senior Naval Officer Turkey, commanding the U.S. Naval Detachment in Turkish Waters. Bristol arrived in Istanbul on 28 January 1919, and raised his flag on . In August 1919 Bristol also received the diplomatic appointment of U.S. High Commissioner, responsible to the State Department for diplomatic matters in Turkey. In his naval capacity Bristol was responsible to Commander, U.S. Naval Forces, European Waters. In May 1920, , flagship of Vice Admiral Harry S. Knapp, Commander, U.S. Naval Forces, European Waters, accompanied by , evacuated a number of American naval and relief personnel from the Caucasus. In September 1920, the flagship "Pittsburg" ran aground in the Baltic sea off Libau and returned to the United States for repairs. From January 1921 until April 1922, Vice Admiral Albert P. Niblack served as Commander, U.S. Naval Forces, European Waters. In October 1922, "Pittsburgh" returned to the Mediterranean and became flagship for two of Niblack's successors as Commander-in-Chief, U.S. Naval Forces European Waters, Admiral Philip Andrews in 1924–1925 and Vice-Admiral Roger Welles in 1925–1926.