As Union soldiers marched into Richmond in 1865, General Lee’s army began to receive reinforcements.
had only 35,000 men and no food.
planned to reclaim their capital city.
headed for Atlanta in full retreat.

had only 35,000 men and no food.

Explanation:

As Union soldiers marched into Richmond in 1865, General Lee’s army "had only 35,000 men and no food, " with lesser food.

At this point, General Lee's army was very low on supply, in terms of resources and humans or soldiers.

Hence, considering the situation of General Lee's army, his command and soldiers were later surrendered to General Grant, thereby the aftermath of General Lee's surrender cause an end to the Civil War.