Proclamation applied to territory held by Confederates at the time. However, the Proclamation became a symbol of the Union's growing commitment to add emancipation to the Union's definition of liberty. Lincoln played a leading role in getting the constitutionally required two-thirds majority of both houses of Congress to vote for the Thirteenth Amendment, which made emancipation universal and permanent. Enslaved African Americans had not waited for Lincoln before escaping and seeking freedom behind Union lines. From the early years of the war, hundreds of thousands of African Americans escaped to Union lines, especially in Union-controlled areas such as Norfolk and the Hampton Roads region in 1862 Virginia, Tennessee from 1862 on, the line of Sherman's march, etc. So many African Americans fled to Union lines that commanders created camps and schools for them, where both adults and children learned to read and write. The American Missionary Association entered the war effort by sending teachers south to such contraband camps, for instance, establishing schools in Norfolk and on nearby plantations. In addition, nearly 200,000 African-American men served with distinction in the Union forces as soldiers and sailors; most were escaped slaves. The Confederacy was outraged by armed black soldiers and refused to treat them as prisoners of war. They murdered many, as at the Fort Pillow massacre, and re-enslaved others. On February 24, 1863, the Arizona Organic Act abolished slavery in the newly formed Arizona Territory. Tennessee and all of the border states (except Kentucky and Delaware) abolished slavery by early 1865. Thousands of slaves were freed by the operation of the Emancipation Proclamation as Union armies marched across the South. Emancipation came to the remaining Southern slaves after the surrender of all Confederate troops in spring 1865. In spite of the South's shortage of manpower, until 1865, most Southern leaders opposed arming slaves as soldiers. However, a few Confederates discussed arming slaves. Finally, in early 1865, General Robert E. Lee said that black soldiers were essential, and legislation was passed. The first black units were in training when the war ended in April. End of slavery Booker T. Washington remembered Emancipation Day in early 1863, when he was a boy of9 in Virginia: The war ended on June 22, 1865, and following that surrender, the Emancipation Proclamation was enforced throughout remaining regions of the South that had not yet freed the slaves. Slavery officially continued for a couple of months