The Battle of the Beaufort was fought between the Israel Defense Forces (IDF) and the Palestine Liberation Organization (PLO) on June 6, 1982, over Beaufort Castle, Lebanon. It was one of the first clashes of the 1982 Lebanon War and resulted in the IDF capturing the castle.

Beaufort or Belfort Castle, known locally as Qal'at al-Shaqif or Shaqif Arnun, is a Crusader fortress in Nabatieh Governorate, Southern Lebanon, about 1 kilometre (0.62 mi) to the south-south-east of the village of Arnoun. There was a fortification on the site before it was captured by Fulk, King of Jerusalem, in 1139 and construction of the Crusader castle probably began soon after. Saladin captured Beaufort in 1190, but 60 years later Crusaders re-took it. In 1268 Sultan Baibars finally captured the castle for the Islamic forces.