In medieval Europe, a march or mark was, in broad terms, any kind of borderland,[1] as opposed to a state's "heartland". More specifically, a march was a border between realms or a neutral buffer zone under joint control of two states in which different laws might apply. In both of these senses, marches served a political purpose, such as providing warning of military incursions or regulating cross-border trade.
Marches gave rise to titles such as marquess (masculine) or marchioness (feminine) in England; marqués (masculine) and marquesa (feminine) in Spanish-speaking countries and the Catalan and Galician regions; marquês (masculine) and marquesa (feminine) in Portuguese-speaking countries; markesa (both masculine and feminine) in Basque; marquis (masculine) or marquise (feminine) in France and Scotland, margrave (German: Markgraf, lit. 'march count'; masculine) or margravine (German: Markgräfin, lit. 'march countess', feminine) in Germany, and corresponding titles in other European states.