Final answer:
General Lee's former army, the Army of Northern Virginia, lacked food, suffered from disease, and was outnumbered by the Union forces.
Step-by-step explanation:
General Lee's former army, the Army of Northern Virginia, lacked several key resources during the Civil War. One major issue was a lack of food, resulting in widespread starvation among the troops.
Disease also plagued the army due to poor camp conditions. Additionally, the army was outnumbered and outgunned by the Union forces, making it difficult to win battles.