Passage: The Japanese Instrument of Surrender at the end of World War II was signed on September 2, 1945, on board USS Missouri (BB-63), which was anchored at 35° 21′ 17″ N 139° 45′ 36″ E. A flag from one of Commodore Perry's ships was flown in from the Naval Academy Museum and displayed at the ceremony.

Question: What was signed during the ceremony?
Japanese Instrument of Surrender