American soldiers posing with human skulls in Colon Cemetery in Havana, Cuba, c. 1899.
Three views of Elmira Prison, the Union POW camp in Elmira, New York, c. 1864/1865. Confederate POWs can be seen lined up for roll call in the first and third photographs as Union guards patrol the wall encircling the prison. All three photographs were taken from approximately the same location at different intervals of time as tents can be seen being replaced with barracks and variations in the amount of foliage can be observed.
Confederate soldiers of the 1st Alabama Infantry Regiment posing in front of their encampment in Fort Barrancas, Pensacola, 1861. By J.D. Edwards.
The Old City Gate of St. Augustine, Florida, c. 1847. Possibly taken during a stopover in the anonymous photographer's journey to document the Mexican-American War as it is from a collection of photographs from the conflict.
"Expecting a Filipino attack behind the cemetery wall." American soldiers posing behind a wall in Pasig during the Philippine-American War, c. 1899. Animated stereoview.