Description This massive structure was once used as a UNSC training facility in the newer days of Halo. Marines could skydive, learn the tatics of their hogs, and train for manuvering with the newly aquired covenate ghost. Now that this arena has been revamped wThis massive structure was once used as a UNSC training facility in the newer days of Halo. Marines could skydive, learn the tatics of their hogs, and train for manuvering with the newly aquired covenate ghost.