At the beginning of the civil war, Colquitt was appointed captain in the 6th Georgia Infantry. Eventually rising to colonel, he led his regiment in the Peninsula Campaign. At Seven Pines, he assumed brigade command after Brig. Gen Gabriel Rains was wounded, and led it through the Seven Days Battles. He led his brigade under Stonewall Jackson in the Battle of South Mountain, Battle of Antietam, the Battle of Fredericksburg, and the Battle of Chancellorsville. Colquitt survived Antietam unscathed although nearly every other officer in the brigade was killed or wounded. After the battle, he was immediately promoted to brigadier general, to rank from September 1. After Chancellorsville, some questions arose about Colquitt's performance during that battle, and he was transferred to North Carolina in exchange for Brig. Gen Junius Daniel's brigade. His brigade was transferred again in the summer of 1863 to protect Charleston, South Carolina. In February 1864, Colquitt marched his brigade south to help defend against the Union invasion of Florida, and was victorious in the Battle of Olustee. After this battle, Colquitt's brigade rejoined Robert E. Lee's Army of Northern Virginia. Late in the war the brigade returned to defend North Carolina, where Colquitt surrendered in 1865.
Political life
After returning to political life and near the end of the Reconstruction era, Colquitt defeated Republican candidate Jonathan Norcross for governor of Georgia in 1876. He was one of a number of Democrats elected to office as white conservatives regained power in the state, in part by an overt effort by paramilitary insurgents to disrupt and suppress Republican voting, especially by freedmen. Around that time, several thousand "friends" asked for about 30 open government patronage jobs. Those who did not get one of the jobs tried to turn voters against Colquitt. There were rumors that Colquitt was involved in illegal dealings with the Northeastern Railroad. A legislative committee found the governor innocent. During this time he was a part of the Bourbon Triumvirate. Colquitt was reelected in 1880 to serve two years under the new state constitution, which reduced the term of governor from four years to two. Under his term, debt was reduced. In 1883, Colquitt was elected by the state legislature as a Democrat to the US Senate from Georgia. He was re-elected to a second term in 1888. In 1892, Colquitt suffered a stroke and became partially paralyzed. He recovered enough to resume his duties as a senator, but in March 1894, he suffered another stroke that left him mostly incapacitated. He died two weeks later. His body was returned to Georgia, where he was buried in Rose Hill cemetery in Macon.
Family life
Colquitt's brother, Col. Peyton H. Colquitt, was killed at age 31 at the Battle of Chickamauga. Colquitt was married twice: first to the former Dorothy Elizabeth Tarver, and after her death to her brother's widow, the former Sarah Bunn Tarver. He was the father of three children with his first wife and seven children with his second wife.