The 677th Bombardment Squadron is an inactive unit of the United States Army Air Forces it was last assigned to the 444th Bombardment Group at Davis-Monthan Field, Arizona. During World War II, the 677th Bombardment Squadron was an Army Air Forces combat organization. It was part of the first Boeing B-29 Superfortress group formed for the 58th Bombardment Wing, and served in the China Burma India Theater and Pacific Ocean Theater as part of Twentieth Air Force. The squadron's aircraft engaged in very heavy bombardment operations against Japan. The squadron received the Distinguished Unit Citation for its combat operations on three occasions. When the unit was inactivated on 1 October 1946 its B-29 aircraft and personnel were reassigned to the 43d Bombardment Group.