CQC meaning in General ?

Close-quarters combat (CQC) or close-quarters battle (CQB) is a tactical situation that involves a physical fight with firearms involved between multiple combatants at quite short range. It can occur between military units, police/corrections officers and criminal elements, and in other similar situations. In warfare, it usually consists of units or teams of varying size engaging the target or attacking personnel with personal weapons within a distance of up to 100 meters (110 yards), from proximity hand-to-hand combat to close-quarter target negotiation with usually automatic weapons. In the typical close combat scenario, the attackers try a very fast, violent takeover of a vehicle or structure controlled by the defenders, who usually have no easy method to withdraw. Because attacking and defending personnel, hostages/civilians, and friendly personnel can be closely intermingled, close-quarters combat demands a rapid assault and a precise implementation of lethal force. The operators need obvious, sufficient proficiency with their weapons, and the ability to make quick decisions in order to limit friendly casualties and raise the likelihood of operational success.

Criminals sometimes use close-quarters–combat techniques, such as in an armed robbery or jailbreak, but most of the terminology comes from training used to prepare military personnel, law enforcement/corrections officers, and other types of government agencies. Therefore, much material relating to close-quarters combat is written from the perspective of the authorities who must break into the stronghold where the opposing force has barricaded itself. Typical examples would be commando operations behind enemy lines and hostage rescues.Although there is considerable overlap, close-quarters combat is not synonymous with urban warfare, sometimes known by the military acronyms FIBUA (Fighting In a Built-Up Area) in the United States, and FISH (Fighting In Someone's House) in the United Kingdom. Urban warfare is a much larger field, including logistics and the role of crew-served weapons like heavy machine guns, mortars, and mounted grenade launchers, as well as artillery, armor, and air support. In close-quarters combat, the emphasis is on small infantry units using light, compact weapons that one person can carry and use easily in tight spaces, such as carbines, submachine guns, shotguns, pistols, knives, and bayonets. As such, close-quarters combat is a tactical concept that forms a part of the strategic concept of urban warfare, but not every instance of close-quarters combat is necessarily urban warfare – for example, a jungle is potentially a stage for close-quarters combat.