 The costumes were chiefly influenced by World War II , the American Civil War , the American Old West , and 1861 samurai Japan . Trpcic used deep reds and oranges for the main cast , to express a feeling of " home " , and contrasted that with grays and cool blues for the Alliance . Since the characters were often getting shot , Trpcic would make up to six versions of the same costume for multiple takes . 
