The 1st Aero Squadron refueling at Casas Grandes, Mexico. To the left, a portion of the squadron truck train; to the right Signal Corps Nos. 43 and 45.
United States Army Signal Corps
1916
<a rel="nofollow" class="external free" href="http://www.afhso.af.mil/shared/media/document/AFD-100928-064.pdf">http://www.afhso.af.mil/shared/media/document/AFD-100928-064.pdf</a> The 1st Aero Squadron and the Mexican Punitive Expedition of 1916