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The Interplanetary Strategic Alliance Marine Corps is the ground component of the ISA Navy. The ISA Navy transports the Marines to and from their theaters of operation and supports them when they are on the ground. Each of the ISA Navy's Cruisers can carry 7,500 personnel, 5000 of whom could be ISA Marines and the rest crew and support personnel. It is possible however that a smaller contingent of marines are assigned to ships, with additional troop numbers made up by other troops such as legionnaires or regular troops.
The Marines were first deployed by the UCA against Helghast forces in the First Extrasolar War. Now, they are powerful and well-supplied military force as seen in Killzone 2.
The Second Extrasolar War Edit
When the Vektans called upon Earth to provide it with reinforcements after the Helghast invasion, Earth answered with a large naval task force being loaned to the ISA Navy; as usual, this task force carried its own complement of Marines. The Marines reinforced the severely weakened ISA Army units on Vekta, and finally liberated Vekta from the Helghast.
After Vekta was liberated, the ISA launched a retaliatory attack against the Helghast's home planet of Helghan, with the Marines at the forefront of this invasion. Arriving approximately two weeks before the second wave, the first ISA assault wave took heavy casualties, but succeeded establishing several planetary beachheads. After the arrival of the second wave, which notably included a few Special Forces units, the attack resumed in earnest. After intense fighting in both cramped urban and dangerous desert wasteland conditions, the ISA forces steadily gained control of vital territories in and around Helghan's capital city, Phyrrus. However, the Helghast unleashed a devastating surprise counterattack that destroyed most of the ISA's orbiting atmospheric command fleet, including the ISA's flagship. In addition, the commanding officer for the entire Helghan campaign, Colonel Jan Templar, is killed in the surprise attack by Helghast Colonel Radec himself. With mounting losses and a drastically reduced support structure, the ISA's forces were nearly annihilated when Scolar Visari detonated the Red Dust nuclear weapon in the center of Pyrrhus; with most of the remaining ISA forces concentrated in the city, this was a severely crippling blow. In a desperate gamble, Captain Jason Narville-who was now the de-facto leader for all remaining ISA ground forces on Helghan- rallied any and all remaining Marines in an all-out, last-ditch attack on Visari's palace, assisting Alpha Squad in its capture, and accidental killing, of Visari. Despite Visari's passing, the remaining ISA Marines find themselves stranded on Helghan as a surprise Helghast fleet begins to bear down upon them.
Marines are the first to fight on the battlefield and are known for their honor, valor, bravery and most importantly, their dedication as the main military forces of the ISA. Ironically, with their vaunted reputation as being one of the ISA's finest ground units, they are clearly seen being constantly slaughtered both in-game and in the opening cinematic of Killzone 2 and 3. It was only the arrival of a Naval Legionnaire contingent-Alpha Squad itself- that helped turned the tide on Helghan.
6 months after the invasion, they have been weakened to the point of being a guerrilla-force as opposed to an invasion force due to the lack of personel and equipment left available. Despite the dire circumstances, the last ISA forces are able to destroy the forces of Jorhann Stahl and unleash the Terracide, ending the War.
The Cold War Edit
After the War, they have become largely subservient to the VSA. They now serve as law enforcement, anti-terrorist operations and security stationed around Vekta and in sections of the Wall.
Battle Dress Uniform (BDU) Edit
Killzone 2 and 3 Edit
In on field engagements, the Marines are commonly issued with black Combat helmets resembling 21st century Ops-Core helmets, equipped with orange protective lenses,to protect from shrapnel, integrated communications systems and mountings for equipment such as Night-vision Goggles. In Killzone 2, the Marines are typically issued with body armor resembling plate carriers and MOLLE vests in Killzone 3, but some Marines prefer to remove them for increased mobility and decreased weight. They are also commonly issued backpacks ,for storage of equipment , ammunition carriers attached to their belts, and black combat boots.
Killzone: Mercenary Edit
The Marines under the command of Alex Grey wear a similar uniform. With minor differences such as the lack of protective lenses, and their faces are covered with balaclavas.
Killzone Shadow Fall Edit
The Marines have a largely unchanged appearance after 30 years, though they are now equipped with more advanced blue Combat Helmets and blue pauldrons, They are also equipped with datapads mounted on their wrists and sport an overall cleaner and professional look.
ISA Marines are equipped with a variety of different weaponry. The standard-issue weapon of the average grunt would be the M82 Assault Rifle, with the underslung M303 Grenade Launcher issued for extra firepower if needed. The Marines also field several revolvers as part of its arsenal, with powerful M3 and M4 Revolvers being the most popular choice of sidearms.For suppressive fire, the M224-A1 Light Machine Gun is used to increase the firepower of squads currently on the battlefield, for use on vehicles and as an emplacement for base defense. Special forces teams and scouting parties are typically issued the suppressed M66-SD Submachine Gun. The LS13 Shotgun is commonly fielded for close-quarters engagements.
30 years after the Second Extrasolar War, their role is changed from a dedicated military force to peacekeeping duties and as security forces on Vekta. To modernize the old M82 Assault Rifle, all units are issued the new, powerful and more accurate M55 Rumbler. After reports of the revolver's inaccuracy and slow reload time, the new semi-automatic LS12 Ripper was issued to fulfill its role as a sidearm, though the M6 Punt was issued alongside it due to veterans favoring the M4's clean design and stopping power. On the other hand, the new LS21 Valk was fielded for CQB battles, with the suppressed variant typically used by law enforcement and special forces teams. The LS36 Breacher was also issued to increase close-range firepower and to replace the LS13. For long-range anti-personnel firepower and support, new recon teams were issued the LS70 Fors.
Infantry teams were also issued the M80 Missile Launcher for greater firepower against fortifications and buildings, and as anti-armor support against tanks and armored vehicles.
For reconnaissance and anti-infantry support, the Corps field the Jeep, often equipped with mounted versions of the M22-A1 LMG. For armored infantry transport and seaborne engagements, the tracked ISA AAPC was used.
For heavier engagements, the ISA Archer Tank and LS209 Exoskeleton were both fielded for anti-aircraft and anti-tank roles, respectively. For ground support, the ISA Lancer was used for indirect and direct artillery.
- 6th Marine Division
- 8th Infantry
- 32nd M.A.T.
- Convoy Avenger
- Convoy Punisher
- Convoy Nemesis
Health: 100 hitpoints
First Appearance: Corinth River: Corinth Sands( Killsone 2)
- Garza turns out to be friends with one Marine, Jeffries, who is assumed KIA after his Intruder is shot down in the Corinth River stage. He is most likely either the soldier who is executed in front of Sev or he is the soldier who Garza grieves over before leaving the area. It may imply that Garza had served with Jeffries previously, or maybe even that Garza has some history within the ISA Marine Corps before joining the Legion special forces Alpha Squad.
- The ISA Marine Corps rank structure and equipment is mostly based on the real-life United States Marine Corps.