Wrestling is a combat sport involving grappling-type techniques such as clinch fighting, throws and takedowns, joint locks, pins and other grappling holds. The sport can either be theatrical for entertainment (see professional wrestling), or genuinely competitive. A wrestling bout is a physical competition, between two (occasionally more) competitors or sparring partners, who attempt to gain and maintain a superior position. There are a wide range of styles with varying rules with both traditional historic and modern styles. Wrestling techniques have been incorporated into other martial arts as well as military hand-to-hand combat systems.