What I got out of it: The 2 spartans were fighting or trying to escape some odd thing, and a fight between the odsts and the spartans ensued. The odst commando shot the spartan in the head, which is why there is a hole in the spartan's head and helmet and hy the commando is holding a pistol in his hand. MC is also damaged, sparking with smoke, which suggests that they were in a fight.