Muzzleloader; units were garbed as Zouves throughout the entire war... ironically Zouves dress was based on North African tribesman serving w/ the French Army.
French uniforms were common on both sides of the Mason Dixon both Zouve style dress and elements of Regulation French Army Dress. Several North Eastern states issued full uniforms & kit that were French pattern. The
CS issued many trousers & packs originally destined for the French Army.
French Arms were initially issued all over the place on both sides of the line... some were 1st rate arms; most were not.
The kepi... was a direct copy of a French cap.
French military practices were considered the epitome of the day and if copying is flattery the French should have been flattered.