Unarmed combat

Hand-to-hand combat (sometimes abbreviated as HTH or H2H) is a lethal or non-lethal physical confrontation between two or more persons at very short range (grappling distance) that does not involve the use of firearms or other distance weapons. While the phrase "hand-to-hand" appears to refer to unarmed combat, the term is generic and may include use of striking weapons used at grappling distance such as knives, sticks, batons, or improvised weapons such as entrenching tools. While the term hand-to-hand combat originally referred principally to engagements by combatants on the battlefield, it can also refer to any personal physical engagement by two or more people, including law enforcement officers, civilians, and criminals.

Combat within close quarters (to a range just beyond grappling distance) is commonly termed close combat or close-quarters combat. It may include lethal and non-lethal weapons and methods depending upon the restrictions imposed by civilian law, military rules of engagement, or ethical codes. Close combat using firearms or other distance weapons by military combatants at the tactical level is modernly referred to as close quarter battle. The United States Army uses the term combatives to describe various military fighting systems used in hand-to-hand combat training, systems which may incorporate eclectic techniques from several different martial arts and combat sports.

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