Orion Expeditionary Corps

The Orion Expeditionary Corps, is the main ONI Ground Task Force (ONIGTF) of the Orion Nero Initiative Army. It's main unit is the 7th Infantry Division that appears throughout the Orion Nero Initiative series, and is based out of Kiko Air Base.

The Orion Expeditionary Corps is considered the main fighting force of the ONI as it is the unit that sees the most action and conflict against the Alvitr Central Security, formerly commanded by Lieutenant General Coburn.

Organisation

 * 6th Infantry Division
 * 7th Infantry Division
 * 1st Infantry Brigade Combat Team
 * 2nd Infantry Brigade Combat Team
 * 3rd Stryker Brigade Combat Team
 * 1st Armoured Brigade Combat Team
 * Combat Aviation Brigade

Officer Ranks
Officer Ranks (OF) are split into three categories, being Company Grade Officers (OF-1 to OF-3), Field Grade Officers (OF-4 to OF-6), and General Officers (OF-7 to OF-9).


 * Company Grade Officer: Refers to the lowest operational commissioned officer within the OEC, that operates at a company level, usually seeing combat on the field. They typically command platoons, companies and troops of soldiers. Company officer ranks include Junior Lieutenant, Lieutenant, and Captain.
 * Field Grade Officer: Officers operating at a battalion, regimental, or brigade level and are usually the head of an operation. Field officers sometimes sees combat in the field, and include the Major, Lieutenant Colonel, and Colonel.
 * General Officer: Refers to any rank above the Colonel in the OEC, which consists of the Major General, Lieutenant General, and General. General Officer ranks are usually in charge of divisions, corps, or even armies of soldiers.

Other Ranks
Other Ranks (OR) are split into three categories, being junior enlisted personnel (OR-1 to OR-2), Junior Non-Commissioned Officers (OR-3 to OR-6), and Senior NCO's (OR-7 to OR-9.


 * Junior Enlisted Personnel: Refers to the lowest military ranking soldiers in the entire army. Junior Enlisted Personnel make up majority of the military fighting force for the OEC because they hold no leadership responsibilities. Junior Enlisted Personnel includes the Private, Lance Corporal, and the recruit which is essentially a part of the actual army yet.
 * Junior NCO: Refers to the lowest military rank with leadership responsibilities. Junior NCOs consist of Corporal, Sergeant, Staff Sergeant, and Sergeant First Class. The role of Junior NCO's are to lead fireteams, squads, or as platoon sergeants.
 * Senior NCO: Refers to the most experienced enlisted ranking soldiers within the OEC, usually in charge of other enlisted soldiers, but can also act as advisers for commissioned officers. Senior NCO ranks include Master Sergeant and First Sergeant, the latter being the highest obtainable enlisted rank.

Equipment
Weapons/Roles


 * Rifleman (R): Every OEC soldier is issued a SIG Sauer MCX Carbine as the main rifle, with a SIG Sauer P320 as the pistol. Each soldier has access to M18 Smoke, M67 Fragmentation, and M84 stun grenades.
 * Grenadier (GR): Grenadiers are also issued either a 40mm M320 Grenade Launcher Module or a M203 Grenade Launcher that can be attached to the under-barrel of the MCX Carbine.
 * Automatic Rifleman (AR): An option between the Fightlite MCR Light Machine gun fitted with a 100 round drum magazine, or a SIG Sauer MG338 Light Machine Gun
 * Combat Medic (M): Combat Medics have the same firearms and equipment as the rifleman, but have more aid-rendering gear.
 * Marksman (DMR): Marksmen usually carry a M110 SASS designated marksman rifle as their main weapon and a SIG Sauer P320 as a secondary, but may also carry a MP5 on person.
 * Sniper (S): Specifically designated sniper teams within the OEC will be issued a Barret MRAD sniper rifle, capable of 50 calibre rounds.
 * Light Anti-tank Personnel (LAT): LAT soldiers are standard riflemen but are issued an AT4 84mm disposable rocket launcher against light armoured vehicles
 * Heavy Anti-tank Personnel (HAT): HAT soldiers are standard riflemen but carry heavier and more powerful rockets, either being a SMAW, M3 MAAWS, or a Javelin, used against heavy armoured vehicles. HAT soldiers within the OEC usually operate in an anti-armour team with a second soldier as an ammunitions carrier.

Vehicles


 * The OEC uses the Puma as a High Mobility Multipurpose Vehicle and the Cougar as a Mine-Resistant Ambush Protected vehicle, capable of being both a cargo and troop carrier.
 * Howler tank used as the Main Battle Tank while the Tempest is the standard Infantry Fighting Vehicle, and the Stryker as an Armoured Personnel Carrier.