The American Civil War began in April 1861, and by the end of May the Lincoln administration approved a policy of not returning fugitive slaves who came within Union lines from disloyal states. Such slaves were deemed "contraband of war," or "contrabands." On August 6, 1861, Congress declared the forfeiture of contraband to be permanent by passing the first of the Confiscation Acts, and two days later Lincoln's War Department issued instructions emancipating all the slaves who came within Union lines from disloyal states or owners. By the end of the year thousands of slaves were being emancipated.