ok, let me correct a few things, it IS the mk VI, Halo wars is set before halo 1, around the first time the UNSC met the covenant (there might be some campaigns on harvest?)
the Spartans in the pictures and in halo wars are SPARTAN II's, the spartan 1's were all killed during the argumentation progress. i would explane more but thats what the novels are for (PLEASE read the first one, the back story is very important)
the spartan III's wear SPI armor (semi powered infiltration armor) If you want to find out about them i would suggest reading ghosts of onyx
im also planning to make the mk VI after i finish my mk IV