One hundred and fifty years ago, the United States was saved at the Battle of Gettysburg. At most of the decisive points of the battle, it was soldiers from Maine that stopped the Rebel army in its tracks. While Joshua Chamberlain and his 20th Maine Regiment are perhaps the most well known, in fact eleven infantry and cavalry regiments, plus three artillery batteries and a company of sharpshooters—comprising some 3,700 volunteers—represented the state of Maine in the battle. Historian Jerry Desmond details, location by location around the battlefield, the heroic actions of the volunteer regiments from Maine.