Close-quarters battle has occurred since the beginning of warfare, in the form of melee combat, the use of ranged weaponry (such as
slings,
bows, and
muskets) at close range, and the necessity of
bayonets. During
World War I, CQB was a significant part of
trench warfare, where enemy soldiers would fight in close and narrow quarters in attempts to capture trenches. The origins of modern close-quarters battle lie in the combat methods pioneered by Assistant Commissioner
William E. Fairbairn of the
Shanghai Municipal Police, the police force of the
Shanghai International Settlement (1854–1943). After the 1925
May Thirtieth Movement, Fairbairn was tasked with developing a dedicated auxiliary squad for
riot control and aggressive policing. After absorbing the most appropriate elements from a variety of
martial arts experts, Fairbairn condensed these arts into a martial art he called "
defendu". The aim of defendu was to be as brutally effective as possible, while also being relatively easy for recruits and trainees to learn compared to other martial arts. The method incorporated both less-lethal and lethal fighting tactics, such as
point shooting, firearm combat techniques, and the use of more ad hoc weapons such as chairs or table legs. During
World War II, Fairbairn was recruited to train
Allied special forces in defendu. During this period, he expanded defendu's lethality for military purposes, calling it the "Silent Killing Close Quarters Combat method"; this became standard combat training for British special forces. He also published a textbook for CQB training called
Get Tough.
U.S. Army officers
Rex Applegate and
Anthony Biddle were taught Fairbairn's methods at a training facility in Scotland, and adopted the program for the training of Allied operatives at
Camp X in Ontario, Canada. Applegate published his work in 1943, called
Kill or Get Killed. During the war, training was provided to
British Commandos, the
First Special Service Force,
OSS operatives,
U.S. Army Rangers, and
Marine Raiders. Other military martial arts were later introduced elsewhere, including European
Unifight, Chinese
sanshou, Soviet
sambo, and the Israeli
kapap and
Krav Maga. For a lengthy period following World War II,
urban warfare and CQB had barely changed in infantry tactics. Modern firearm CQB tactics were developed in the 1970s as "close-quarters battle" by Western
counterterrorist special forces units following the 1972
Munich massacre. The units trained in the aftermath of the massacre, such as the
Special Air Service,
Delta Force,
GSG 9,
GIGN, and
Joint Task Force 2, developed CQB tactics involving firearms to quickly and precisely assault structures while minimizing friendly and
hostage casualties; these CQB tactics were shared between these special forces units, who were closely-knit and frequently trained together. The Special Air Service used CQB tactics during the 1980
Iranian Embassy siege. CQB tactics soon reached
police tactical units and similar
paramilitaries, such as American
SWAT teams, by the 1980s and 1990s. However, CQB was still not widely taught to regular
infantry, as it was considered a hostage rescue tactic. As late as the 1990s, some infantry manuals on urban combat described close-quarters room clearing essentially the same basic way it was described 60 years prior: a grenade being thrown into an enclosed area, followed by an infantry assault with automatic fire. The special forces "monopoly" on CQB was broken following the experiences of urban warfare and close-quarters battles in the 1990s, during the
Battle of Mogadishu, the
Bosnian War, and the
First Chechen War. The
First and
Second Battles of Fallujah during the
Iraq War were the watershed moments for infantry CQB, when
U.S. Marines, under pressure to capture the city of
Fallujah,
Iraq from
insurgents, used conventional
combined arms and
fire support against the city, and lacked proper CQB training and equipment to effectively clear buildings, causing numerous civilian and allied casualties and severely damaging the city. With similar struggles in towns and cities among
ABCA Armies during the
War in Afghanistan, a proper approach to infantry in urban warfare became crucial, and CQB tactics began to be more widely taught to infantry. According to scholar Anthony King, some special forces units
express disdain at regular infantry being taught CQB, especially in organizational politics and internal matters such as securing budgets; a unit with CQB training requires expensive equipment and training facilities, using up funding that could be used for other units or purposes. ==Examples==