If you were from a well off militia,you would have had nicely made uniforms.You would have had polished buttons,nice material,fine stitching.If you were of a middle class militia,then I think you would have had the money to buy pre-made uniforms.Heck,battleshirts,matching trousers,and kepis would be a rather in-expensive uniform to do.If you were a poor militia,then civie clothes.It would all have depended on your ablility to maintain clothes.
South Union Guard
"Always carry a flagon of whiskey in case of snakebite, and furthermore always carry a small snake"~W.C. Fields
"When I drink whiskey, I drink whiskey; and when I drink water, I drink water."~Michaleen Flynn 'The Quiet Man'