Orbital Drop Shock Trooper (Earth-2042)

"Most of the crew—not to mention your fellow jarheads—will be leaving the ship in lifeboats. They'll ride to the surface in air-conditioned comfort, sipping wine, and nibbling on appetizers. Not you, however. Oh no, you're going to leave the Pillar of Autumn in a different method. Tell me boys and girls... how will you leave? We go feet first, sir!"

- Major Anto Silva rousing his battalion

The Orbital Drop Shock Troopers (ODST), informally referred to as Helljumpers, are an elite special operations component of the Imperial Marine Corps and previously the Systems Alliance Marine Corps and the Corps' rapid reaction force. One of the primary special operations forces of the Imperial Military and formerly the Systems Alliance Armed Forces, the ODST are under the administrative and operational control of Naval Special Weapons. The organization is headquartered in Coruscant. Its primary training facilities were located on Reach prior to the glassing of the planet during the Clone Wars.

Source

 * https://www.halopedia.org/Orbital_Drop_Shock_Trooper