 The squadron dropped food and supplies and flew photographic missions in connection with flood-relief operations in central California, 12–13 December 1937; upgraded to the B-18 Bolo in 1938, and in 1939 to early-model Boeing B-17B Flying Fortress for long range reconnaissance patrols.Moved to Fort Douglas, Utah in 1940 when the short runways at Hamilton proved inadequate for B-17 operations, with a secondary move to Salt Lake City Army Air Base in January 1941 where it was upgraded to the B-17E.In October 1941, was ordered to Clark Field, Philippines Commonwealth to build up forces there due to increased tensions between the United States and the Japanese Empire.