Browse Items (203 total)

French soldiers wearing gas masks in a trench, 1917. Gas mask technology varied widely during the war, eventually developing into an effective defense, limiting the value of gas attacks in later years

French Cavalry observe an Army plane fly past

A German Pfalz Dr. I single-seat triplane fighter aircraft, ca. 1918.

A Farman airplane with rockets attached to its struts.

British Mark I tank, apparently painted in camouflage, flanked by infantry soldiers, mules and horses.

American troops aboard French-built Renault FT-17 tanks head for the frontline in the Forest of Argonne, France, on September 26, 1918.

Telegraph office, room 15, Elysee Palace Hotel, Paris, France, Major R.P. Wheat in charge. September 4, 1918.

Turkish troops use a heliograph at Huj, near Aza City, in 1917. A heliograph is a wireless solar telegraph that signals by flashes of sunlight usually using Morse code, reflected by a mirror.

American troops using a newly-developed acoustic locator, mounted on a wheeled platform. The large horns amplified distant sounds, monitored through headphones worn by a crew member, who could direct the platform to move and pinpoint distant enemy…

The complex inner machinery of a U.S. submarine, amidships, looking aft.