A mess (also called a messdeck aboard ships) is an area where military personnel socialize, eat, and (in some cases) live. In some societies this military usage has extended to other disciplined services eateries such as civilian fire fighting and police forces. The root of mess is the Old French mes, "portion of food" (cf. modern French mets), drawn from the Latin verb mittere, meaning "to send" and "to put" (cf. modern French mettre), the original sense being "a course of a meal put on the table". This sense of mess, which appeared in English in the 13th century, was often used for cooked or liquid dishes in particular, as in the "mess of pottage" (porridge or soup). By the 15th century, a group of people who ate together were also called a mess, and it is this sense that persists in the "mess halls" of the modern military.