Col. Joshua Chamberlain and the 20th Maine on Little Round Top defending the left of the Union line.

The 8th Kansas Volunteer Infantry attacks Tucker’s Brigade, Army of the Tennessee.

The 8th Ohio Volunteer Infantry attacks the left flank of Davis’ Brigade of Pettigrew/Trimble’s Division.

Field artillery in fluid motion. Mr. Gallon’s first Civil War print.

Colonel Joshua Chamberlain - his 20th Maine almost out of ammunition - orders a bayonet charge.

General Ambrose Powell Hill leading the Light Division of Jackson’s Corps across Beotler’s Ford.

"Why do men fight who were born to be brothers?"

Elements of Hiram Berdan’s 2nd United States Sharpshooters, in their trademark green coats, engage Longstreet’s Corps.

According to one eyewitness, the advancing Confederate Column seemed to “disintegrate”.

The Bucktails were a renowned regiment from Northwestern Pennsylvania easily recognized by the bucktail attached to their hats.