"The Emancipation Proclamation consists of two executive orders issued by United States President Abraham Lincoln during the American Civil War. The first one, issued September 22, 1862, declared the freedom of all slaves in any state of the Confederate States of America that did not return to Union control by January 1, 1863. The second order, issued January 1, 1863, named the specific states where it applied."
"Hearing of the Proclamation, more slaves quickly escaped to Union lines as the Army units moved South. As the Union armies conquered the Confederacy, thousands of slaves were freed each day until nearly all (approximately 4 million, according to the 1860 census) were freed by July 1865."
"Juneteenth, also known as Freedom Day or Emancipation Day, is an official annual holiday in 29 states of the United States. Celebrated on June 19, it commemorates the announcement of the abolition of slavery in Texas."