Federal troops, following the important win at Antietam, clash with a massive Rebel army in what became the largest battle of the Civil War.

In July 1863, an exclusive group of Yankee sharpshooters are tasked with halting Gen. Robert E. Lee's Alabamian shock troops from flanking the Union line.

Confederate troops mount an effort to retake the city of Nashville, cutting the supply line which is maintaining the Union invasion of the South.

Two Vermont officers plan a daring raid on the city of Petersburg, Virginia, which is surrounded by a series of apparently impregnable trenches.

Outlaw Bill Doolin and his posse, The Oklahombres, commit a plethora of bank, train and stagecoach robberies in the Oklahoma area during the 1890s.

Jim Miller, one of the most violent men who lived in the American Old West, pretends to be a devout family man despite being an outlaw and contract killer.

In Kansas, Ford County Sheriff Masterson was a well-dressed gunfighter, gambler, hunter, Native-American fighter and a scout, but upholding the law came first.

On this special edition, a revealing profile details a number of America's most powerful men, and the origins of the country they governed.

A special edition; the story of the most famous flying devices in history, such as Apollo 11 and Air Force One, and the truth behind our influential inventors.

Exploring the story behind the men who discovered the New World, and undertaking a journey to find the facts behind the most famous bridge and road in the U.S.

A special edition, exposing the truth and background behind some of America's favorite Fall holidays, such as Halloween and Thanksgiving.

The history of the high seas is exposed, and the truth is separated from fiction about the nation's legendary, pioneering aviators.

The truth and surprising facts surrounding two of our greatest engineering accomplishments, the Panama Canal and the Transcontinental Railroad, are explored.

Legendary sharpshooter Delf "Jelly" Bryce prepares to encounter some of Oklahoma City's most violent men during America's gangster era.

A lawman who used his fists instead of a gun, Tom Smith was a professional boxer turned Old West marshal, determined to clean up the vicious town of Abilene.

A German terrorist cell operating in America is uncovered by a New York City policeman, who must fight to save his country before time runs out.

Famed private investigator is hired to protect a railroad, but as his investigation progresses, he uncovers an assassination plot against Lincoln.

As the first Italian-American police detective in New York's Little Italy, Joe Petrosino is filled with a resolve to do what it takes to protect his people.