TR's sons' regiments during war, 1917-1918. [No. 1]

Soldiers walk in formation on a road accompanied by several mounted men. Because of the soldiers' heavy clothing, it must be winter. This group may be the 26th Infantry, Theodore and Archibald Roosevelt's regiment. Following sequence is of biplanes flying in formation; third sequence is shot at a hangar where men appear to be preparing a plane for flight. The second and third sequences may be of Quentin Roosevelt's squadron, the 95th. The last sequence probably represents Kermit Roosevelt's regiment, the 7th Field Artillery. In this sequence a group of men load and fire a cannon.