 Unique to Berlin at that time, U.S. Army Military Police served as guards to this U.S. State Department facility, instead of the normal Marine Security Guard contingent at all other U.S. embassies.The presence of U.S. Marines at the Mission might have been seen as a movement towards establishing a full-fledged embassy, which the U.S. was careful to avoid.Throughout the time Berlin was under four-power control, the U.S. was insistent that Berlin, East or West, should not be considered a capital until Berlin was unified.