Judo from its very beginning has been a self-defense and combat discipline. The original Judo from Jigoro Kano was and still is a full featured combat discipline which formed the basis for many Military and Police tactics around the world.
Judo served well as an official system of Japanese Imperial armed forces and Japanese police. In 1886 the Tokyo Metropolitan Police Academy hosted a tournament between the Kodokan (The Kodokan Institute, is the headquarters of the worldwide judo community in Japan.) and the prominent Jujutsu style, to determine which "style" the Academy would adopt into their training regimen. Out of the tournament's 15 matches the Kodokan won 12 and had 1 draw. The reason why the Kodokan was so successful at this historic meeting lies in one word: Randori. Randori or free sparring trained Kanos judokas in as close to real life and death combat as possible.
Judo was probably the first Japanese martial art introduced to the west, most notably through the U.S. military in the modern era. As American GIs were introduced to the Japanese culture from the early 1900’s onward it was inevitable that the martial art of Judo found its way into the American culture.
CPT. Allen Corstorphin Smith of the United States Army trained at the Kodokan in Japan. CPT. Smith was awarded a judo black belt from the Kodokan in Japan in 1916 and was the hand to hand combat instructor at the Infantry school at ft, Benning Georgia.
Various aspects of Judo were taught to all U.S. military police as an effective way to deal with arresting and controlling drunken, brawling GIs without seriously harming them. The great Judo legend Masahiko Kimura shared a story in his biography about being approached shortly after WWII in the summer of 1946 by a Capt. Shepherd of the U.S. Military Police to train Military Police personnel in Judo.
The United States Air Force has at times in its history been at the forefront of Combatives Training. Soon after the establishment of the Air Force as a separate service in September 1947, GEN Curtis Lemay was appointed as the Commanding General of the Strategic Air Command (SAC). GEN Lemay, who had masterminded the US air attacks on the Japanese mainland during World War II, knew that more US bomber groups in Europe had suffered more combat casualties than the US Marine Corps had in the pacific. Many of the lost Airmen ended up as German Prisoners of War. He was determined that all of his flying personnel would have a working knowledge of hand-to-hand combat to aid in escape and evasion.
In 1951 GEN Lemay appointed Emilio "Mel" Bruno, his Judo teacher and a former national American Athletic Union (AAU) Wrestling champion and fifth degree black belt in Judo, to direct a command wide Judo and combative measures program. He devised a program combining techniques from Aikido, Judo and Karate. In 1952 the Air Training Command took over the program. The Commanding General was General Thomas Power. Because of the deficiency in qualified instructors, Power sent two classes of twenty four Airmen to train at the Kodokan for several weeks. Based upon the success of this trial and after an official delegation from the Kodokan toured SAC bases in the United States, Bruno set up an eight week training course at the Kodokan. Students trained eight hours a day, five days a week and upon return to the United States were assigned throughout SAC. The course was a Japanese designed mix of judo, aikido, karate and taihojutsu.
From 1959 to 1966 the Air Force Combative Measures (Judo) Instructors Course was taught at Stead Air Force Base in Reno Nevada. The 155 hour course consisted of: 36 hours fundamentals of judo, 12 hours aikido, 12 hours karate, 12 hours Air Police Techniques, 12 hours Aircrew self-defense, 18 hours judo tournament procedures, 5 hours code of conduct and 48 hours training methods. There were also a 20 hour Combative methods course and a 12 hour Combative survival course for Aircrew members.
Being recognized as so effective in combat, Judo became the basis for most of the hand-to-hand combat skills taught to soldiers in basic training throughout all branches of the U.S. military.
Combatives, US Army Field Manual FM3-25-150, Department of the Army, 18 January 2002, Washington D.C.
"Strikes are an inefficient method of ending a fight. However, they are a significant part of most fights, and a solider must have an understanding of fighting at striking range. It is important to note that while at striking range, you are open to being struck. For this reason, it is often better to avoid striking range."
US Marine Corps Close Combat, MCRP 3-02, Department of the Navy, 12 February 1999, Washington D.C.
"Marines should avoid being on the ground during a close combat situation because the
battlefield may be covered with debris and there is an increased risk of injury. However, many close combat situations involve fighting on the ground. The priority in a ground fight is for Marines to get back on their feet as quickly as possible."
Although Judo is widely considered an Olympic sport it is however much more "combatives" oriented. The judoka trains at grappling range, a close quarter combat range developing avenues to quickly put an end to a hand to hand or close quarter combat situation. Current Judo rules on groundwork foster such a mindset – execute and explode into a groundwork submission technique in a matter of seconds or get back on your feet. Judo also prepares you mentally and physically to withstand the rigors of an assault. There is a reason that old school law enforcement and the United States military taught Judo...IT WORKS.