Whats up with the mix-matched armor sets in Halo 4? One is olive drab metallic armor with a face mask, another is mostly white and appears to be made out of more fabric like material and the other one is the same thing as the white except for the fact that it is black? (ODST's Maybe)
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Maybe they are the uniforms for different groups of armed forces? Maybe they are the only clothes some soldiers could find?