 During the American Civil War, President Abraham Lincoln issued the preliminary Emancipation Proclamation on September 22, 1862.It was formally issued on January 1, 1863, declaring that all enslaved persons in the Confederate States of America in rebellion and not in Union hands were freed.More isolated geographically, planters and other slaveholders had migrated into Texas from eastern states to escape the fighting, and many brought enslaved people with them, increasing by the thousands the enslaved population in the state at the end of the Civil War.