Final answer:
Lincoln issued General Order 11 during the Civil War to enforce the laws of war and protect the soldiers of the United States.
Step-by-step explanation:
The purpose of Lincoln issuing General Order 11 during the Civil War was to enforce the laws of war and protect the soldiers of the United States. This order, also known as the Order of Expulsion, was issued on December 17, 1862, and it ordered the expulsion of all Jews from certain areas within the Department of the Tennessee, which included parts of Kentucky, Mississippi, and Tennessee. Lincoln issued the order in response to reports of alleged Confederate sympathies among Jewish traders and merchants in those areas. However, the order was later revoked and has been widely condemned as discriminatory and unjust.