The Union General Ambrose Burnside.
Side Burns
The left side
General Ambrose Burnside gave his name to the side burns.
He was the lead general for the union side (north).
he was on the north side he was on the north side
Northern General Ambrose Burnside; namesake of today's "side-burns" (facial hair).
He was on the South side.
Confederates
It was Robert E. Lee
Confederate
confederate (south)
There was no "good side" in the civil war. There are no good or bad people. People just do what they think is best.