The American Civil War was the first major conflict that was photographed extensively, bringing shocking and often horrific images to the front pages and into people's living rooms. Photography was extremely popular in the US at the time, and many photographers did not hold back from snapping even the most graphic of post-battle images to illustrate the horrors of war. Original captions were often scrawled below or on the backs of photos - you can read a few here in quotes.
Several of the images in this gallery are graphic in nature and may be disturbing.
The most daring and innovative accomplishment at the turn of the 20th century.
After notorious revolutionary leader Pancho Villa's raid on Columbus, New Mexico, General John Pershing and his 150,000 man cavalry set out to get Villa.
In the Philippines, Army Rangers liberated 513 prisoners of war three years after the Bataan Death March.
The decisions made by leaders and the escalation of bloodletting that finally ended World War II.
General Douglas MacArthur led American troops in World Wars I and II before being fired by President Harry Truman during the Korean War.
Robert E. Lee, the leading Confederate general of the American Civil War, remains a source of fascination and, for some, veneration.
Robert Noyce's invention of the microchip launched the world into the Information Age.
The country's oldest beauty contest has become a battleground and a barometer for the position of women in society.