A photographic postcard with a view of a disappearing gun in the battery (firing) position at Fort Stevens, Oregon.

A map based off 1858 military surveys showing the approximate locations for military roads constructed between 1859 to 1862. Also shown on the map are locations for farms, camps, trails, bridges, vegetations types, rapids, rock outcrops, landings, and locations of battles. Relief shown by form lines. This map is part of series: Senate executive document (United States. Congress. Senate) ; 47th Congress, 3rd session, no. 43.

A traced manuscript map showing a rough sketch of military marches in eastern Oregon and western Idaho by expedition in the summer of 1864. Military routes for George Byron Currey and Reuben F. Maury's expeditions as well as battlegrounds are hand colored in red. Main trails, mining towns, military forts, and major geographic features are also identified on the map. Relief shown by hachures.

A photograph of a drawing depicting old Fort Astoria in 1845. An American flag flies over the fort. The back identified the artist as Henry J. Barre, but the correct name is likely Henry J. Warre. Handwritten note on back of print reads, "Old Fort Astoria 1845 by Captain Henry J. Barre, British Army." Photograph of drawing taken by Arthur M. Prentiss.

A circa 1860 hand-drawn plan of the grounds at Fort Astoria, Oregon, in 1811 showing the layout of buildings at the site.

A hand colored map of the United States of America in 1861 showing national military divisions along with forts and military posts. Map insets show detailed harbor plans for the following: New Orleans and delta of Mississippi, Louisiana; Mobile Bay, Alabama; Entrance to Pensacola Bay, Florida; Key West, Florida; Savannah River; Charleston Harbor, S. Carolina; Hampton Roads and Norfolk Harbor, Virginia; Washington and vicinity; Baltimore and vicinity. Relief is shown by hachures.

Two maps of Fort Canby in the Washington Territory. The first shows the U.S. Military Reservation at Fort Canby at Cape Disappointment and the second shows a closer look at buildings and facilities in Fort Canby. The first map's legend provides context about the establishment of Fort Canby and describes the environment and conditions. The second map's legend describes various facilities in Fort Canby in detail, including the hospital, reading room and school, and military barracks. Watercolor sketches of Fort Canby and Cape Disappointment Lighthouse are included.

A pen and ink map of the plan of Fort Dalles in the Oregon Territory. The map shows old buildings in blue and new buildings in black.

Photograph of Fort Walla Walla, taken on May 1st, 1859. The photograph was originally owned and may have been taken by Frederick Tracy Dent (1820-1892). Born in St. Louis, Missouri, Frederick Tracy Dent (1820-1892) served as a career military officer for the United States Army, and served as captain of the 9th United States Infantry at Fort Walla Walla from circa 1859-1860. Dent participated in the Spokane and Yakima expeditions, and engaged in the combat of "Four Lakes," and Spokane Plains. Dent was brother-in-law to Ulysses S. Grant. In 1859, Fort Walla Walla was part of the incorporated Washington Territories in Washington State.

This photograph of Camp Barry in 1864, was originally owned and may have been taken by William Russell Parnell. The photograph depicts several buildings that are part of the camp, and includes the inscription “Camp of John Simons” on the back. The inscription also mentions a "Remount Station," which may refer to a military Remount Service, and was a division of the Army that trained horses and mules for military use.

This photograph of Camp Harney taken between 1970-1971, was originally owned and may have been taken by William Russell Parnell. From the inscription on the back of photograph: "Troop H - First Cavalry was stationed at this Post from August 1868 to June 1975. About 360 miles SSE of the Dalles, Oregon. Snowed from December to June each year. Abandoned 1879 or 80." This photograph shows several of the camp’s buildings. Parnell's signature is visible on top-left corner of photograph.

This photograph, taken of the Post Traders Store in 1868, was originally owned and may have been taken by William Russell Parnell. Parnell's signature is visible on top-left corner of photograph.

This photograph, taken of Camp Warner’s Officers Quarters in 1869, was originally owned and may have been taken by William Russell Parnell. Parnell's signature is visible on top-left corner of photograph.

This photograph, taken of the Officers Quarters at Fort Boise, Idaho in 1868, was originally owned and may have been taken by William Russell Parnell. The photograph depicts several soldiers posing outside the store, with an inscription on the back, “Compliments of Dr. Moffatt.” The inscription refers to the military surgeon Dr. Peter Moffat, who also served at Camp Harney. Parnell's signature is visible on top-left corner of photograph.

A copy photograph of a building under construction in Mount Idaho, Idaho. A wooden foundation can be seen with timber stacked on top of it. Four women and a man are gathered underneath a nearby tree. A house and barns are visible in the distance. Accompanying description reads, "The Old Fort at Mt Idaho."