Defence

 Self-defense (or self-defence in Commonwealth English) is a countermeasurethat involves defending the health and well-being of oneself from harm.[1] The use of the right of self-defense as a legal justification for the use of force in times of danger is available in many jurisdictions.[2]

Demonstration of a jujutsu defense against a knife attack in BerlinGermany (1924).

Self-defense in the context of a home invasion or trespassing is also known as home defense.P