Final Answer:
Ambrose Burnside was a Union general in the American Civil War. He was defeated by Robert E. Lee's Confederate forces at the Battle of Fredericksburg.
Step-by-step explanation:
Ambrose Burnside was an American Civil War general who served as a major general in the Union Army. He was born in Liberty, Indiana, and was a graduate of West Point. He began his military career in the Mexican-American War, and became a Union general in 1861. He led the Army of the Potomac in several important battles, most notably at the Battle of Antietam.
In December of 1862, Burnside led his army against Robert E. Lee's Confederate forces at the Battle of Fredericksburg. Burnside's troops charged the heavily fortified Confederate positions, but were unable to breach them. The Union suffered massive casualties, while the Confederates suffered relatively few casualties. The Union forces were forced to retreat, with Burnside resigning from command soon after.
The Battle of Fredericksburg was a major victory for the Confederacy, and a major setback for the Union. The heavy losses suffered by the Union greatly undermined its morale, and it was a long time before the Union was able to regroup and launch another major offensive. The battle also showed that Lee was a formidable opponent, and confirmed his reputation as one of the foremost military commanders of the Civil War.
Overall, Ambrose Burnside was a Union general who led his forces at the Battle of Fredericksburg, only to suffer a crushing defeat at the hands of Robert E. Lee and the Confederate army. The battle was a major victory for the Confederacy, and a major setback for the Union. It also confirmed Lee's reputation as one of the greatest military commanders of the Civil War.