ear gas is fired at protesters demonstrating against the death of George Floyd outside the 3rd Precinct Police Precinct on May 26, 2020 in Minneapolis, MN.

Why Do Police Use Tear Gas When It Was Banned in War?

The development of chemical warfare around the time of World War I led to the use of tear gas as a weapon by civilian police forces.
Allan Pinkerton at the camp at Antietam in September, 1862

A Horse’s-Eye View of the Civil War

Horses and mules played a major role in the American Civil War. In the end, there were about twice as many dead equines as humans.