The Confederate States Army, also called the Confederate Army or the Southern Army, was the military land force of the Confederate States of America (commonly referred to as the Confederacy) during the American Civil War (18611865), fighting against the United States forces in order to win the independence of the Southern states and uphold the institution of slavery. On February 28, 1861, the Provisional Confederate Congress established a provisional volunteer army and gave control over military operations and authority for mustering state forces and volunteers to the newly chosen Confederate president, Jefferson Davis. Davis was a graduate of the U.S. Military Academy, and colonel of a volunteer regiment during the MexicanAmerican War. He had also been a United States senator from Mississippi and U.S. Secretary of War under President Franklin Pierce. On March 1, 1861, on behalf of the Confederate government, Davis assumed control of the military situation at Charleston, South Carolina, where South Carolina state militia besieged Fort Sumter in Charleston harbor, held by a small U.S. Army garrison. By March 1861, the Provisional Confederate Congress expanded the provisional forces and established a more permanent Confederate States Army.

An accurate count of the total number of individuals who served in the Confederate Army is not possible due to incomplete and destroyed Confederate records; estimates of the number of individual Confederate soldiers are between 750,000 and 1,000,000 troops. This does not include an unknown number of slaves who were pressed into performing various tasks for the army, such as the construction of fortifications and defenses or driving wagons. Since these figures include estimates of the total number of individual soldiers who served at any time during the war, they do not represent the size of the army at any given date. These numbers do not include sailors who served in Confederate States Navy.

Although most of the soldiers who fought in the American Civil War were volunteers, both sides by 1862 resorted to conscription, primarily as a means to force men to register and volunteer. In the absence of exact records, estimates of the percentage of Confederate soldiers who were draftees, are about double the 6 percent of Union soldiers who were conscripts.Confederate casualty figures also are incomplete and unreliable. The best estimates of Confederate military personnel deaths are about 94,000 killed or mortally wounded, 164,000 deaths from disease, and between 26,000 and 31,000 deaths in Union prison camps. One estimate of the Confederate wounded, which is considered incomplete, is 194,026.The main Confederate armies, the Army of Northern Virginia under General Robert E. Lee and the remnants of the Army of Tennessee and various other units under General Joseph E. Johnston, surrendered to the U.S. on April 9, 1865 (officially April 12), and April 18, 1865 (officially April 26). Other Confederate forces surrendered between April 16, 1865, and June 28, 1865. By the end of the war, more than 100,000 Confederate soldiers had deserted, and some estimates put the number as high as one-third of all Confederate soldiers. The Confederacy's government effectively dissolved when it fled Richmond on April 3, 1865, and exerted no control over the remaining armies.

Andrew Johnson (December 29, 1808 – July 31, 1875) was the 17th president of the United States, serving from 1865 to 1869. He assumed the presidency as he was vice president at the time of the assassination of Abraham Lincoln. Johnson was a Democrat who ran with Lincoln on the National Union ticket, coming to office as the Civil War concluded. He favored quick restoration of the seceded states to the Union without protection for the former slaves. This led to conflict with the Republican-dominated Congress, culminating in his impeachment by the House of Representatives in 1868. He was acquitted in the Senate by one vote.

Johnson was born into poverty and never attended school. He was apprenticed as a tailor and worked in several frontier towns before settling in Greeneville, Tennessee. He served as alderman and mayor there before being elected to the Tennessee House of Representatives in 1835. After briefly serving in the Tennessee Senate, Johnson was elected to the House of Representatives in 1843, where he served five two-year terms. He became governor of Tennessee for four years, and was elected by the legislature to the Senate in 1857. In his congressional service, he sought passage of the Homestead Bill which was enacted soon after he left his Senate seat in 1862. Southern slave states seceded to form the Confederate States of America, including Tennessee, but Johnson remained firmly with the Union. He was the only sitting senator from a Confederate state who did not resign his seat upon learning of his state's secession. In 1862, Lincoln appointed him as Military Governor of Tennessee after most of it had been retaken. In 1864, Johnson was a logical choice as running mate for Lincoln, who wished to send a message of national unity in his re-election campaign; and became vice president after a victorious election in 1864.

Johnson implemented his own form of Presidential Reconstruction, a series of proclamations directing the seceded states to hold conventions and elections to reform their civil governments. Southern states returned many of their old leaders and passed Black Codes to deprive the freedmen of many civil liberties, but Congressional Republicans refused to seat legislators from those states and advanced legislation to overrule the Southern actions. Johnson vetoed their bills, and Congressional Republicans overrode him, setting a pattern for the remainder of his presidency. Johnson opposed the Fourteenth Amendment which gave citizenship to former slaves. In 1866, he went on an unprecedented national tour promoting his executive policies, seeking to break Republican opposition. As the conflict grew between the branches of government, Congress passed the Tenure of Office Act restricting Johnson's ability to fire Cabinet officials. He persisted in trying to dismiss Secretary of War Edwin Stanton, but ended up being impeached by the House of Representatives and narrowly avoided conviction in the Senate. He did not win the 1868 Democratic presidential nomination and left office the following year.

Johnson returned to Tennessee after his presidency and gained some vindication when he was elected to the Senate in 1875, making him the only former president to serve in the Senate. He died five months into his term. Johnson's strong opposition to federally guaranteed rights for black Americans is widely criticized; he is regarded by many historians as one of the worst presidents in American history.