The UMA LDI(Light Desert Infantry) Is simmallar to the LFI(Light Forest Infantry), The only difference is that it uses "Chocolate Chip" Camo, an Extra Enforced helmet, and a SHUD(Shadowed-Heads-Up-Display). They are Mainly sent on Desert Missions
(Note: On the Minecraft Forums, This is part of a Skin Pack! You can find it Here!http://www.minecraftforum.net/topic/1445371-united-minecraftia-army-skins/)