"Halo 4: I Get a Woman!" - Sgt. Mjr. A.J. Johnson, RIP

[=sw=warlord]

Nightfall, tip of the spear, and Pillar of Autumn were the only maps that centered around a desert environment. And Nightfall, and Tip of the Spear were the same area. Other than that, no desert.

You've not played lone wolf have you?
swordbase/package were based in glacial deserts though by the time package arrived there was little glacial left.