They are trained to serve in arid environments and their armor is equipped with cooling units, anti-glare lenses, extra rations and water supplies. Sandtroopers can be distinguished by their colored pauldrons which indicate rank: black for enlisted, white for sergeants, and orange for unit leaders.[36][37] Sandtroopers that ride Dewbacks are known as Dewback riders. Snowtroopers, also known as cold weather assault stormtroopers, are first seen during the battle of Hoth in The Empire Strikes Back (1980).