ANSWER
No, he was an Union General.
Union - Ambrose Burnside Confederate - Robert E. Lee
A.E. Burnside [NEW RESPONDENT] Braxton Bragg
Confederate General Robert E. Lee defeated the forces of Union General Burnside at the Battle of Fredericksburg. The defeat was due to the bad tactics of Burnside, who under the command of Lincoln, urged Burnside to begin a frontal assault. It was a disaster for the Union.
General Ambrose Burnside went to attack the Confederate Capitol in Richmound, Virginia. His attempt ended with and overwhelming defeat which was the significance. This failure lead to Burnside's replacement with General Joseph Hooker.
Major General Ambrose Burnside
Ambrose Burnside led the raids that distracted Confederate troops, enabling General Grant to land his troops south of Vicksburg.
burnside
At the Battle of Fredricksburg, Confederate General Robert E. Lee' opponent was General Ambrose Burnside. Lee gained a major victory at that battle.
Lincoln was disappointed that General George B. McClellan had allowed Confederate general Lee to escape after the Battle of Antietam. The result of Lincoln's disappointment was the replacement of McClellan by General Burnside.
Major General Ambrose Burnside took his army from Kentucky and occupied the important city of Knoxville, Tennessee on September 2, 1863. President Lincoln knew there was pro-Union sentiment in eastern Tennessee and it was important to have Union troops there. Burnside also took the opportunity to cut Confederate railway lines.
Ed Burnside has written: 'Reminiscences of Ed Burnside, Chippewa-General'
general hooker