[2] It moved to Davis-Monthan Field, Arizona, where it was equipped with Consolidated B-24 Liberators and served as an operational training unit until late March 1943.

[3] Its personnel were withdrawn circa 3 December 1943 as it moved to Muroc Army Air Field, California and it remained a paper unit until it was inactivated in March 1944.

[4] The 680th was equipped with later-model B-29As, with only minor differences than the original B-29 model built by Boeing with some revised engine nacelles and pneumatically-operated bomb-bay doors which could be snapped shut in less than a second.

the squadron moved to North Field (Tinian) in the Mariana Islands of the Central Pacific Area in June 1945[4] and joined the XXI Bomber Command of Twentieth Air Force.

The squadron flew low level nighttime incendiary raids until the end of the war in August 1945,[5] attacking major Japanese cities, causing massive destruction of urbanized areas.

[citation needed] It moved to Clark Field in the Philippines, where it was inactivated in March 1946[4] and its low-hour aircraft were flown to storage depots in the United States.