The Battle of Hosn was a one-day battle around the village of Hosn and its proper center in the 900-year-old medieval Crusader castle of Krak des Chevaliers, a UNESCO world heritage site, that had been in the hands of rebel fighters along with Hosn itself since 2012. The Syrian Army's objective during the battle was to sever the rebels' supply routes for recruits and weapons coming in and out of Lebanon.