File:Flag of the United States Army (1775).gif

Summary
United States Army flag. This image is a work of a U.S. Army soldier or employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain. Source available here: https://commons.wikimedia.org/wiki/File:Flag_of_the_United_States_Army_%281775%29.gif