The US changed it's uniform in 1872 from the one commonly used during the ACW.
The biggest change was the introduction of a blue cloth-covered chaco, piped white with a white fir-cone-shaped pompon. Officers had drooping plumes. The uniform was also changed to include white collar patches, white shoulder straps, white cuff patches and white piping down the front of the coat (officers had double breasted coats). Belts were black.
Very obscure and short period for US uniforms.
In 1881, the spike helmet was introduced....