A wargame is a type of strategy game that simulates warfare realistically, as opposed to abstract strategy games such as chess. Wargames may be miniature figurines on a tabletop, board games or video games. They typically use a map that depicts various battlefield terrain features such as woods, hills, fields and streams, with a grid or location system superimposed over this to regulate the movement and positions of the games' pieces, each of which represents a specific military formation, such as an infantry brigade or artillery battery. Many wargames recreate specific historic battles, and can cover either whole wars, or any campaigns, battles, or lower-level engagements within them. Many simulate land combat, but there are wargames for naval and air combat as well.