Why did Robert E. Lee invade Pennsylvania and engage the Union army at Gettysburg? (1 point) Responses He was upset at the loss of Stonewall Jackson. He was upset at the loss of Stonewall Jackson. He wanted to extend the war. He wanted to extend the war. He wanted to demoralize the Union. He wanted to demoralize the Union. He wanted to enlist troops from the North.

The main reason Robert E. Lee invaded Pennsylvania and engaged the Union army at Gettysburg was because he wanted to demoralize the Union.