en echelon an arrangement of units in a step-like manner to the right or left of the rear unit. When attacking, the first unit starts with the others coming in one by one in sequence, like a wave moving forward from one side to the other.
Ewell’s people will demonstrate Ewell’s forces will create a diversion on the left to keep the Union from reinforcing the line where Longstreet will be attacking.
enfilade fire fire directed at the entire length of an enemy line, such as when an attacker fires from the side of that line right into them.
the high Rocky Hill the name the Confederates were using for Little Round Top, as they did not know its name at the time.
vedettes mounted guards placed ahead of pickets, well ahead of an advancing force, to watch the enemy movements and notify commanders.
