Orbital Drop Shock Troopers

The Orbital Drop Shock Troopers (or ODSTs for short) are a special forces unit of the UNSC Marine Corps who make orbital insertions through planetary atmospheres. Delivered to their targets via Human Entry Vehicles or, if stealth is needed, by parachute, these soldiers are always in the most danger of being killed on a mission. As the HEVs enter the atmosphere, they become unbearably and life-threateningly hot. It is a volunteer only unit, and some consider those that join the unit to be crazy. They are the toughest soldiers the UNSC has to fight the Covenant with, with the exception of SPARTAN-IIs or SPARTAN-IIIs. The 105th Orbital Drop Shock Trooper Division is the toughest of the ODST units and are nicknamed "Helljumpers" for their tenacity.

History
ODSTs were operating as early as 2525. In Halo: The Fall of Reach, the Master Chief was forced to fight ODSTs on more than one occasion. Because of this, it seems that some ODST and Spartan units do not get along most of the time. ODSTs were aboard the UNSC Pillar of Autumn, the UNSC Atlas as well as the UNSC In Amber Clad. It is very possible that every vessel in the UNSC has a detatchment of ODSTs.

In Halo: The Flood, the group of ODSTs led by Major Antonio Silva were instrumental in ensuring that the survivors of the Pillar of Autumn were well protected, although none of them were ever seen in Halo: Combat Evolved. However the marines on the level Truth and Reconciliation have more health and could be helljumpers without the armor.

In Halo 2, the ODSTs that accompany the Master Chief on the drop onto Delta Halo are clad in black armor with silver reflective visors instead of the regular Marine uniform. ODST soldiers were on the orbital defense stations in orbit above Earth as on the first level of Halo 2 four ODSTs could be seen lying dead on Cairo Station. Also ODSTs were seen in the video Another Day at the Beach.

As of 2552, there were numerous ODST units, as Lord Hood once commented that the Spartan-IIs had more confirmed kills than "any three divisions of ODSTs."

List of ODSTs
Sorted by rank, then alphabetically if rank unknown.
 * Major Antonio Silva
 * First Lieutenant Melissa McKay
 * Second Lieutenant Dalu
 * Second Lieutenant Oros
 * Master Sergeant Lister
 * Company Sergeant Tink Carter
 * Gunnery Sergeant Pete Stacker
 * Gunnery Sergeant Waller
 * Sergeant Corly
 * Sergeant Parker
 * Corporal Locklear
 * Lance Corporal "Snaky" Jones
 * Private First Class Hosky
 * Private Marie Postly
 * Private Satha
 * Al-Thani
 * Butkis
 * Dawkins
 * "Doc" Valdez
 * Jones
 * Murphy
 * O'Brian
 * Suzuki
 * Yutrzenika

ODST Units

 * 105th Orbital Drop Shock Trooper Division
 * 7th Orbital Drop Shock Trooper Battalion