The Civil War, Antietam, Md. Allan Pinketon, President Abraham Lincoln, Major General John A. McClernand, photograph from the main eastern theater of the Civil War, Battle of Antietam, September - October 1862, from glass negative, by Alexander Gardner, October 3, 1862.

The Civil War, Antietam, Md. Allan Pinketon, (E.J. Allen) of the Secret Service, on horseback, photograph from the main eastern theater of the Civil War, Battle of Antietam, September - October 1862, from glass negative, by Alexander Gardner, September, 1862.

CIVIL WAR-Photo shows Mathew B. Brady, famed Civil War photographer, in civilian clothers at the left with a Union artillery unit at Petersburg, Va.

The Civil War, Life in Camp, Upset His Coffee, souvenir card showing the daily life of Union soldiers on the front, in the camp and on furlough, chromolithograph by Winslow Homer, circa 1864.

The Civil War, Berlin (now known as Brunswick), Maryland, Pontoon Bridge and ruins of the stone bridge across the Potomac (destroyed in 1861), from the Battle of Antietam, September - October 1862, from glass negative, by Alexander Gardner, 1865.

Civil rights march on Washington DC, a procession of African Americans carrying signs for equal rights, integrated schools, decent housing, and an end to bias, photograph by Warren K. Leffler, August 28, 1963.

The Civil War, Life in Camp, Stuck In the Mud, souvenir card showing the daily life of Union soldiers on the front, in the camp and on furlough, chromolithograph by Winslow Homer, circa 1864.

The Civil War, Life in Camp, Home on a Furlough, souvenir card showing the daily life of Union soldiers on the front, in the camp and on furlough, chromolithograph by Winslow Homer, circa 1864.

Civil rights, Governor George Wallace (third from left), attempting to block integration at the University of Alabama, he is confronted by Deputy U.S. Attorney General Nicholas Katzenbach (front right), photograph by Warren K. Leffler, June 11, 1963.

The Civil War. A Southern View, a depiction of President Abraham Lincoln as the devil, writing the Emancipation Proclamation while trampling the U.S. Constitution; the influence of demons around him, by Adalbert J. Volck, 1864.

The Civil War, a powder monkey, leaning against a cannon, on the U.S.S. New Hampshire, off Charleston, South Carolina, 1864-1865.

The Civil War, view of ruined buildings through porch of the Circular Church, at 150 Meeting Street, Charleston, South Carolina, 1865.

FBI agents escort Byron De La Beckwith into the Jackson city jail after his arrest for the killing of civil rights leader Medgar Evers, 1963

CIVIL RIGHTS, Crawfordville, Georgia, Black demonstrators block school buses carrying white students after the protestors were refused passage aboard the buses. October 1, 1965

The Civil War, Life in Camp, Late For Roll Call, souvenir card showing the daily life of Union soldiers on the front, in the camp and on furlough, chromolithograph Winslow Homer, circa 1864.

Civil rights, riot damage in Washington DC, ruins of a store in Washington DC that was destroyed during the riots that followed the assassination of Martin Luther King Jr, photograph by Warren K. Leffler, April 16, 1968.

The Civil War, African American 'contrabands' (escaped slaves), at Foller's house, Cumberland Landing, Virginia, by James F. Gibson, 1862.

Pierre Gustave Toutant Beauregard (1818-1893) American Confederate General during the American Civil War 19th Century Artist Unknown

The Civil War, Life in Camp, In The Trenches, souvenir card showing the daily life of Union soldiers on the front, in the camp and on furlough, chromolithograph by Winslow Homer, circa 1864.

The Civil War, Life in Camp, Drummer, souvenir card showing the daily life of Union soldiers on the front, in the camp and on furlough, chromolithograph by Winslow Homer, circa 1864.

The Civil War, Abraham Lincoln's coffin in Chicago City Hall, Illinois, inscribed: 'Liberty's Great Martyr', drawing on tan paper, by William Waud, 1865.

CIVIL RIGHTS, Social Circle, Georgia, State troopers arrest demonstrators blocking the path of a school bus protesting school conditions. February 15, 1968

The Civil War, General William Tecumseh Sherman, at the Battle of Kennesaw Mountain, Georgia. Sketch of Union troops charging towards Kennesaw, drawing on yellow paper, by Alfred R. Waud, June 27, 1864.

Civil rights, original caption: 'Congress of Racial Equality conducts march in memory of Negro youngsters killed in Birmingham bombings', All Souls Church, 16th Street, Washington DC, photograph by Thomas J. O'Halloran, September 22, 1963.

The Civil War, Life in Camp, Fording, souvenir card showing the daily life of Union soldiers on the front, in the camp and on furlough, chromolithograph by Winslow Homer, circa 1864.

Men in the fight for Civil Rights participate in a memorial trek from Chatanooga, Tennesse to Jackson, Mississipi. They were honoring William Moore, was was killed in a similar walk, 1963

Tarascan Civilization-Michoacan (Detail) Natives Mapmaking 1942 Diego Rivera (1886-1957 Mexican) Fresco National Palace, Mexico City, Mexico

The Civil War, the Union frigate Congress burning after being attacked by the Confederate ironclad Virginia (formerly the Merrimack), painting by E. Packbauer, 1900

The Civil War, Life in Camp, A Deserter, member of the Zouave Unit, souvenir card showing the daily life of Union soldiers on the front, in the camp and on furlough, chromolithograph by Winslow Homer, circa 1864.

The Civil War, Life in Camp, The Girl He Left Behind Him, souvenir card showing the daily life of Union soldiers on the front, in the camp and on furlough, chromolithograph by Winslow Homer, circa 1864.

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The Civil War, view of ruined buildings through porch of the Circular Church, at 150 Meeting Street, Charleston, South Carolina, 1865.

The Civil War, Antietam, Md. Allan Pinketon, President Abraham Lincoln, Major General John A. McClernand, photograph from the main eastern theater of the Civil War, Battle of Antietam, September - October 1862, from glass negative, by Alexander Gardner, October 3, 1862.

The Civil War, Life in Camp, The Guard House, souvenir card showing the daily life of Union soldiers on the front, in the camp and on furlough, chromolithograph by Winslow Homer, circa 1864.

The Civil War, Life in Camp, Extra Ration, with member of the Zouave Unit, souvenir card showing the daily life of Union soldiers on the front, in the camp and on furlough, chromolithograph by Winslow Homer, circa 1864.

The Civil War, Life in Camp, A Shell is Coming, souvenir card showing the daily life of Union soldiers on the front, in the camp and on furlough, chromolithograph by Winslow Homer, circa 1864.

The Civil War, Bull Run, Virginia (vicinity), Col. Alfred Duffie, 1st Rhode Island Cavalry, from glass negative, by Timothy H. O'Sullivan, July, 1862.

Tarascan Civilization-Michoacan (Detail) Making Dyes 1942 Diego Rivera (1886-1957 Mexican) Fresco National Palace, Mexico City, Mexico

Reconstruction of Elkhorn Tavern Site of 1862 Civil War Battle that saved Missouri for the Union Pea Ridge National Military Park Arkansas

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