Combat knife



A combat knife is a knife designed for close-quarters combat. They are primarily used for trench warfare and boarding actions.

The Covenant use knives as well; the Jiralhanae use their own combat knives as well as a multitude of bayonet-like blades. The Sangheili sometimes use curveblades, which inspired the design of the Type-1 energy sword. The blamite-bladed energy cutlass is an analogous weapon used by the Kig-Yar.

Design details
One version of the UNSC's multi-purpose combat knife has a 20-centimeter (7.9 in) blade made of high carbon steel, an anti-flash, non-reflective titanium carbide coating, edge coated for corrosion resistance and is 43.3 cm long when sheathed. It is also balanced for throwing. The Spartan-IIIs' standard-issue combat knife features a self-sharpening blade made of a hyperdense material. Modern UNSC combat knives are made of strong enough material to pierce a Spartan's helmet, and the hull of a Lich.

The placement of the combat knife sheath varies depending on the combat uniform and individual loadout, and may be kept, for example, on the shoulder with the handle pointing downward, sideways on the lower back, or on the side of the boot. Some Spartan-IVs keep their knives sheathed in a wrist compartment.

Usage
Some soldiers in service with the UNSC carry a combat knife of their own design or choice. Major Faison had a very large knife that he kept sheathed at his ankle, with the words "Bug-Hunter" engraved on the blade. Emile-A239 used a large kukri for his weapon of choice. Roland-B210, a member of the SPARTAN-III program's Headhunters division, also used a custom combat knife. Frederic-104 possesses particular skill with combat knives, and it can be interpreted that he has a liking for their use.

During the Battle of Trove, Sergeant John Forge's combat knife "Lucy" was used to seriously wound Arbiter Ripa 'Moramee, allowing Forge to kill 'Moramee with his own energy sword.

During the Battle of Kamchatka, Spartan Jameson Locke uses his combat knife to fight and kill Jul 'Mdama the leader of the reformed Covenant.

Variants
Large-scale manufacturing and broad leeway with usage means there are hundreds of variations available to UNSC personnel including kukris, ulus, billhooks, and push daggers.
 * M1 combat knife
 * M5 combat knife: The most common knife in service across all UNSC branches. It has an operational history of decades.
 * M11 combat knife: A combat knife designed and built for Spartans, and the standard close combat weapon of Spartan Operations. Manufactured by Watershed Division since 2551, the M11 is constructed with hyper-dense metal alloys, making it nearly unbreakable. When wielded by a Spartan operator, the blade can be thrust with force sufficient to penetrate energy shielding or hardened armor. These blades are extraordinarily sharp and retain their edge even after repeated use. The M11 combat knife is 365.8 millimeters in length and weighs 2 kilograms.
 * MK 88 Ratio: A compact survival and utility knife commonly carried by UNSC and militia forces.
 * Model 52 Navy knife: A large knife preferred by UNSC Navy special forces.
 * Lucy: The combat knife in possession of John Forge.

Entrenched
Knives are used throughout the Entrenched Fracture. Different types can be seen on the EAGLESTRIKE armors.

Gameplay
When performing an assassination, any knives placed on armor will not be used. This can be seen in Theater: despite using a knife to assassinate your opponent, it still appears sheathed on your chest.

List of appearances

 * Halo: The Fall of Reach
 * Halo: The Flood
 * Halo: First Strike
 * Halo 2
 * Halo: Ghosts of Onyx
 * Halo 3
 * Halo: The Cole Protocol
 * Halo Wars
 * Halo 3: ODST
 * Halo Legends
 * Homecoming
 * The Package
 * Halo: Evolutions - Essential Tales of the Halo Universe
 * The Mona Lisa
 * Headhunters
 * Halo: Reach
 * Halo: Fall of Reach
 * Invasion
 * Halo 4: Forward Unto Dawn
 * Halo 4
 * Spartan Ops
 * Halo: Escalation
 * Halo 2: Anniversary
 * Terminals


 * Halo: New Blood
 * Halo: Last Light
 * Halo 5: Guardians
 * Halo: Shadow of Intent
 * Halo Mythos
 * Halo: Tales from Slipspace
 * On the Brink
 * Halo: Smoke and Shadow
 * Halo Wars 2
 * Halo: Retribution
 * Halo: Rise of Atriox
 * Halo: Legacy of Onyx
 * Halo: Bad Blood
 * Halo: Fireteam Raven
 * Halo: Official Spartan Field Manual
 * Halo: Outpost Discovery
 * Halo: Shadows of Reach
 * Halo: Point of Light
 * Halo: Divine Wind
 * Halo Infinite
 * Halo: The Rubicon Protocol
 * Winter Contention