1st Battalion Zouaves Volunteer Infantry, also known as Coppens Zouaves.
This regiment was formed of 6 companies with officers and staff in Pensacola Florida 1861. They would travel north to fight in the Eastern Theater for the Army of Northern Virginia.

Trumpeter in full Zouave Uniform and first issue rifled musket

The reverse view. A Zouave uniform, flowing red pantaloons, short shell jacket, red fez cap, and plenty of braid. They must have made a colorful scene on the march.