The Hers-Mort (French pronunciation:[ɛʁsmɔʁ]; Occitan: Èrs Mòrt; the "Dead Hers", as opposed to the faster-flowing Hers-Vif, or "Live Hers") is a 89.3-kilometre (55.5 mi) long river in southern France,[a] a right-bank tributary of the Garonne.[1] Its average flow rate is 4 cubic metres per second (140 cu ft/s). The Hers-Mort rises in the Lauragais region, near the village Fonters-du-Razès, in the Aude department. It flows northwest through the following departments and towns:
^The river was an important feature during the Battle of Toulouse (1814), contemporary British sources and many secondary sources derived from those contemporary sources, refer to this river as the Ers (Wellington 2010, pp. 425–426; Fremont-Barnes 2006, p. 995).
Fremont-Barnes, Gregory (2006), The encyclopedia of the French revolutionary and Napoleonic Wars: a political, social, and military history, vol. 1 (illustrated ed.), ABC-CLIO, ISBN9781851096466