What circumstances led the union to victory on the third day in the battle of gettysburg?

The Army of the Potomac stood too light to track the Confederates, and Lee directed his troops outward of the North.

Explanation:

On July 2, toward the Union left, General James Longstreet directed the chief Confederate attack, but it held not conducted out until around 4 p.m., and the Federals had the chance to strengthen their places. Thus started some of the massive fights of the conflict, and Union forces grasped charge of their important points at the massive cost. After three hours, the conflict ended.

the answer is jerusalem