 In December 1917 , Streett was posted to Issoudun , France , as an air training instructor . The majority of the United States Army troops and pilots would arrive later , in 1918 . He was then assigned to the 5th Pursuit Group operating out of Lay @-@ Saint @-@ Remy Aerodrome , France . Later , after the Allied victory in November 1918 , he served in Germany with the American occupation forces , and returned to the United States in August 1919 . On July 1 , 1920 , Streett was commissioned a first lieutenant in the Regular Army Officers ' Reserve Corps , Air Service . 
