The 83rd PA used that uniform for exactly 3 months.. They never used it in any battle. It was immeditly removed, when the 3 month recruitment camp was done...
They got quickly the regular uniform.. To get that awfull dress away
Most of the uniforms, which were showed in this thread, were used for 2-3 months. Those uniforms were used during the Battle of Manassas (if the regiment took part in the battle) , but got quicky replaced by federal issued uniforms.
Same for that ugly italian uniform