Daguerreotype Portrait of an Unidentified Man (1850′s)

Daguerreotype portrait of an unidentified man, c. 1850′s.

Source: Smithsonian American Art Museum.

Map Showing the Possible Routes Which German Zeppelins Could Use to Bomb England Published Near the Start of World War 1 in August 1914

Map showing the possible routes which German Zeppelins could use to bomb England published near the start of World War 1 in August 1914. From The Illustrated War News magazine published in 1914.

Map of a Russian Redoubt at the Start of World War 1 (1914)

Map of a Russian redoubt at the start of World War 1. From The Illustrated War News magazine published in 1914.

Portrait of Union Soldiers of the 56th Massachusetts Volunteer Infantry Regiment Playing a Game of Cards in a Camp During the American Civil War (1860′s)

Portrait of Union soldiers of the 56th Massachusetts Volunteer Infantry Regiment playing a game of cards in a camp during the American Civil War, c. 1860′s. From the book War Diary and Letters of Stephen Minot Weld, 1861-1865 published in 1912.

Map of French Forts Surrounding Paris Published Near The Start of World War 1 in September 1914

Map of French forts surrounding Paris published near the start of World War 1 in September 1914. From The Illustrated War News magazine published in 1914.

Propaganda Composite Photo Postcard Showing a Smiling German Who Has Captured Three Allied Soldiers and Put Them in Chains Which Was Published During the Early Months of World War 1 (1914)

Propaganda composite photo postcard showing a smiling German who has captured three Allied soldiers (British, Russian, and French) and put them in chains which was published during the early months of World War 1 in 1914. From The Illustrated War News magazine published in 1914.

Stereoview Portrait of a Group Posing With a Boat on a Beach in Old Orchard Beach, Maine (1800′s)

Stereoview portrait of a group posing with a boat on a beach in Old Orchard Beach, Maine, c. 1800′s. By James O. Durgan.

Source: New York Public Library.

Portrait of President Millard Fillmore Attributed to Baltimore Photographer Jesse Harrison Whitehurst (1850′s)

Portrait of President Millard Fillmore attributed to Baltimore photographer Jesse Harrison Whitehurst, c. 1850′s.

Source: Library of Congress.
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View of the Interior of a Classroom in Winchester, New Hampshire (1800′s)

View of the interior of a classroom in Winchester, New Hampshire, c. 1800′s. By Keene, New Hampshire, photographer J. A. French.

Source: New York Public Library.

“German Winter Watch in the Vosges. Firing a Heavy Howitzer.“ German Soldiers in the Vosges Mountains of France During World War 1 (1910's)

“German winter watch in the Vosges. Firing a heavy howitzer.“ German soldiers in the Vosges Mountains of France during World War 1.

Source: National Archives and Records Administration.

Portrait of Union Drummer Boy George D. Howell Who Served With Company H of the 23rd Pennsylvania Volunteer Infantry Regiment During the American Civil War (1860′s)

Portrait of Union drummer boy George D. Howell who served with Company H of the 23rd Pennsylvania Volunteer Infantry Regiment during the American Civil War, c. 1860′s. From the book History of the Twenty Third Pennsylvania Volunteer Infantry Birney's Zouaves Three Months and Three Years Service published in 1904.

Stereoview of Cuban Rebels in a Trench During the Spanish-American War Titled “Cubans in Their Trenches - Awaiting the Spaniards - Pinar del Río, Cuba.” (1898)

“Cubans in their trenches - Awaiting the Spaniards - Pinar del Río, Cuba.” Cuban rebels during the Spanish-American War, c. 1898. Published by Strohmeyer and Wyman.

Source: Library of Congress.

German Sailors Drilling With the Deck Gun of a U-boat Docked in a Port During World War 1 (1910's)

German sailors drilling with the deck gun of a U-boat docked in a port during World War 1.

Source: National Archives and Records Administration.

“Captain Franz Von Papen, Former German Military Attache at Washington, Who Was Persona Non Grata to the U.S. on Account of His Unfriendly Activities" (1915)

“Captain Franz von Papen, former German military attache at Washington, who was persona non grata to the U.S. on account of his unfriendly activities. He was recalled December 1915.”

Source: National Archives and Records Administration.

“The First Photograph From the Front: German Cavalrymen, Wounded During the Advance on Liège, Being Bandaged” (1914)

“The first photograph from the front: German cavalrymen, wounded during the advance on Liège, being bandaged.” Taken during the German invasion of Belgium in August 1914. From The Illustrated War News magazine published in 1914.

Instantaneous Stereoview of Sailing Vessels in Havana Harbor, Cuba (1860)

Instantaneous stereoview of sailing vessels in Havana Harbor, Cuba, 1860. By American photographer George Barnard.

Source: Library of Congress.

Copy Negative Portrait of a Woman and Child Only Identified as R. Mead (1860′s)

Copy negative portrait of a woman and child only identified as R. Mead, c. 1860′s. Possibly intended to be made into a hidden mother carte de visite print. Attributed to Mathew Brady.

Source: National Archives and Records Administration.

American Soldiers of the 6th US Cavalry Regiment Training Horses in Fort Bayard, New Mexico (1880's)

American soldiers of the 6th US Cavalry Regiment training horses in Fort Bayard, New Mexico, c. 1885.

Source: National Archives and Records Administration.