Award-winning writer Edith Wharton and two of her dogs, USA, ~1890

German troops during a gas attack exercise, WW1, ~1915?

Men crossdressing in a gender-nonconforming way, USA, 1920s

Icebreaker ship on Lake Baikal, Russian Empire, 1899?

“In Europe, it doesn’t matter if you’re a man or a woman - we make love with anyone we find attractive.” - German-American actress and singer Marlene Dietrich, photo taken 1934?

Finnish troops in the defensive line on the Karelian Isthmus. Continuation War against the Soviets. Finland, 16 Jun 1944.

Openly queer jazz singer Gladys Bentley (left) and jazz band leader Willie Bryant (right), USA, 1936

Audience enjoying stereoscopic panoramas, Austro-Hungarian Empire, ~1900

Abandoned BRDM-2 armored car near a town during Nagorno-Karabakh conflict between Armenia and Azerbaijan. 1991-1994.

The Lincoln Memorial under construction, 1917.

Unidentified soldier holds a flamethrower during a training exercise. Fort Belvoir, Virginia, 1942. Photo by Frank S. Errigo

Open-air market in Ulaanbaatar, Mongolia, 1972

Coast Guard patrolman wearing cold weather gear while on duty in Greenland. He carries an M1928 Thompson submachine gun. North Atlantic Weather War 1941-1945.

Austro-Hungarian troops crossing a ford during the 12th Battle of the Isonzo, WW1, 1917

An Australian light machine gun team with a Bren gun in action during the Aitape-Wewak campaign. June 1945.

Manchu soldier of Qing China, 1874

Rural women in Romania, 1922

Four British soldiers with three captured German Goliath tracked mines shortly after D-Day.

Testing US military Z-Binoculars, early infrared systems. Approximately 1944-1945.

Black cat "Teufelsbraten" ("Devil's Roast") ignoring tasty living mouse morsels as he walks down a ladder. Germany, 1989

F-117A after a mishap as the aircraft landed at Holloman AFB, New Mexico. 1997.

Gold miners in Canada, 1853

Imperial German biplane with armor plating, WW1, 1918

Rock legend Freddie Mercury and his partner, Jim Hutton, UK, 1980s

Unloading boats in Helsinki, Finland (then-part-of the Russian Empire), 1898

Swiss troops manning an observation post in the Alps, sometime between 1914-1918

US soldier in Vietnam using PRR-9/PRT-4 radio, carrying an XM16E1 with undermounted XM-148 grenade launcher.

Jamen Butler (left) and Tom Malim, a gay couple, USA, 1971

Pilots of the No. 224 Group RAF in north-eastern India around a Hawker Hurricane Mk IIC (variant using four 20mm cannons instead of 6 .303 Brownings). North-eastern India,1943.

US troops with a French 37mm gun, France, WW1, 1918

Boy with bicycle (and dog), Ontario, Canada, ~1900

A woman in typical menswear of the time, British Mandate of Palestine, 1930s

Early photography sequence of horse and rider jumping over a barrier, USA, ~1887

Three horse sleigh, Russian Empire, ~1900

Training military dogs, Japanese Empire, WW2, some time between 1940-1945

Boulevard of Passeig de Colom, Barcelona, Spain, ~1900

Freight hauling along the Yukon River, Canada, ~1899

Village in Taiwan, ~1898

U.S. Marines watch F4U Corsairs drop napalm on Chinese positions during the Battle of Chosin Reservoir. 1950.

Bedouin man in As-Salt, Jordan, ~1910

Destroyed bridge in Portugal, 1909

Ostrich reading a newspaper with the zookeeper, Amsterdam, the Netherlands, 1951

Aerial view of the Qata'a Bridge over the Tigris River, Baghdad, Iraq, 1932

Mercenary artillerymen with British guns, Qing-dynasty China, ~1880

Street in Nanjing, China, 1932

Jerome, Samuel and Moses Horwitz (1935, "Hoi Polloi" movie set) [notes in post]

First automated aerial photography

Mourner in traditional dress, Korea, 1911

People along the Nile River, Egypt, ~1900?