The Hoosier Heroes at Gettysburg via @YouTube.

Excavating a gravel bed with jets, c. 1863

Carver Hospital, Washington, D.C. Interior view

Prospector's cabin, Knight Island, Prince William Sound, Alaska ca. 1900.

Stagecoach to the San Juan Mountains – Dolores, Colorado, c.1890. Around 1890, a stagecoach rumbled out of the small frontier town of Dolores, Colorado, bound for the rugged and mineral-rich San Juan Mountains. Pulled by a team of sturdy horses, the coach creaked and swayed over

Treaty of Paris by Benjamin West portrays the American mission of (left–right): John Jay, John Adams, Benjamin Franklin, Henry Laurens, and William Temple Franklin. The portrait was never completed because the British commissioners refused to pose. Laurens, pictured, was actually

Chester A. Arthur on American Indian Policy via @YouTube.

Wyatt Earp's Nephew, Virgil Earp, Talks About the Wild West . via

Ambulance drill of the 57th New York Infantry, 1864

Miner and his dog near Silver Plume, Colorado ca. 1900

This 1901 photo depicts two horse-drawn sleighs at the Keystone-Belle mine in northeast Oregon. This mine was in the Bonanza (Geiser) district in Baker County. The Keystone, Belle, and Gold Boy Consolidated Mining Company was incorporated with capital stock of $2,000,000 in 1901.

River mining, North Fork of the American River, c. 1850–1855

Continental Army soldiers, including one from the 1st Rhode Island Regiment on the left

The mostly restored Civil War city class ironclad USS Cairo on display inside the Vicksburg National Military Park! This ship struck a confederate mine in the Yazoo River in 1862 and sank in a matter of minutes with no hands lost. The crew was able to safely make it ashore on

Hopi man at the entrance to the Antelope Kiva at Walpi village in Arizona - 1901

View of Aspen, Colorado ca. 1900. Aspen was one of the West's greatest silver cities, and for a brief time in the early 1890s it eclipsed even Leadville as the largest producer of silver in the nation.

Mining on the American River near Sacramento, c. 1852

Wounded soldiers being tended in the field after the Battle of Chancellorsville near Fredericksburg, Va., May 2, 1863.

Nancy Hart single-handedly captured six Loyalist soldiers who barged into her home intending to ransack it.

Two Apsaroke Native Americans on horseback outside of a tipi in a snow-covered forest in Montana in 1908.