@NeoFox
John would fit into ALL of them. XD
Special 0 Unit (Shinobi): Despite the armor's weight and bulkiness, John is very stealthy. He can sneak up behind a Covenant Elite and kill them without making a sound.
4th Overland Unit (Desert Post) John's suit can survive desert conditions and would keep him safe from the heat.
6th Marine Unit: John can't swim, but thanks to his Darkness, he can use a sort of "Kenesis" to keep himself afloat. His armor also comes with oxygen, so he'll be fine.
7th Air Cavalry: John has thrusters and Darkness that can increase his speed. Not only that, but it would be absolutely terrifying to see a 1,400 pound giant barreling towards your aircraft and ramming straight through it. If need be, he can land on the craft and rip it apart with his bare hands.
8th Armored Division: Do I really need to say anything about this?:p
9th Special Forces (Ranger): Thanks to John's biologically enhanced eyesight and fast reaction time, John would make for a great sniper.
13th Polar Region Unit: Same reason for the desert squad. John is able to easily survive.
14th Grapple Combat Unit: John isn't good with swords, but he is deadly with his fists. Each punch could send a car flying.
17th Elite Unit: He belongs here. If he can single-handedly take on thousands of Covenant forces, then he can take on whatever they assign him to do.





