ODST

The Orbital Drop Shock Troopers (ODST) are an elite group of UNSC Marines that specialize in special wareware tactics.  The ODST's are one of the primary Special Operations units of the United Nations Space Command (UNSC). (Source: Wiki)  They use silenced sub machine guns (SMG).  When they drop, the use Orbital Drop Pods (ODPs).  There helmets have supplies, such as communication devices, knives, survivalist gear and HUDs.  HUDs are built in to their VISR includes objectives, health, binoculars, and a map of the area around them.  "We drop feet first Sir!"-ODST  "They drop feet first into Hell."-Bungie.  ODSTs, Mickey, Dutch, Buck, Romeo, Bork, Sceruffy, Notch and O'Bryan.  Types, demolition, sniper, rookie, recon and commander.  They go in on mostly all secret sabatoge and destroy, I think?