Hey there, have you ever heard of Krav Maga?
Nope. What is it, or who is it?
Krav Maga is a military self-defence and fighting system developed for the Israel Defense Forces.
Wow!  Can you describe the principles?
Krav Maga
Krav Maga (; , "lit." "contact combat") is a military self-defence and fighting system developed for the Israel Defense Forces (IDF) and Israeli security forces derived from a combination of techniques sourced from boxing, wrestling, aikido, judo and karate, along with realistic fight training. 
Krav Maga is known for its focus on real-world situations and its extreme efficiency. It was derived from the street-fighting experience of Hungarian-Israeli martial artist Imi Lichtenfeld, who made
military conscripts.
Krav Maga has a philosophy emphasizing aggression, and simultaneous defensive and offensive maneuvers. Krav Maga has been used by the Israel Defense Forces' special forces units, the security apparatus, and by regular infantry units. Closely related variations have been developed and adopted by Israeli law enforcement and intelligence organizations. There are several organizations teaching variations of Krav Maga internationally.
Etymology.
The name in Hebrew can be translated as "contact combat". The root word "krav" () means "combat"