US Marine Corps Urban Operations training facility

The United States military term for urban warfare is UO an abbreviation for Urban Operations (MOUT, an abbreviation for Military Operations in Urban Terrain has been replaced by UO although the term MOUT Site is still in use). The British military term is OBUA (Operations in Built-Up Areas) or FIBUA (Fighting in Built-Up Areas) or sometimes FISH (Fighting In Someone's House). The term FOFO (Fighting in Fortified Objectives) refers to clearing enemy personnel from narrow and entrenched places like bunkers, trenches and strongholds; the dismantling of mines and wires; and the securing of footholds in enemy areas.