What happened at Little Round Top?

During the second day of the battle, Gen. G.K. Warren, commander of the Engineers Corps of the Army of Potomac, who was carrying a reconnaissance, found the key position of Little Round Top undefended and immediately disposed that two brigade and one battery of the Fifth Corps had to be deployed there.

The order was fulfilled just in time, because the position was after a very short while attacked by Hood's Division.

After a bitter struggle the Federal units succeeded in repulsing the Confederates and the Little Round Top remained in Union hands.