The Amal Movement was formed in 1974 as the armed wing of popular Shiite cleric Musa al-Sadr's Movement of the Dispossessed. Amal supported the intervening Syrian army against the Palestinian Liberation Organization (PLO). Hezbollah, on the other hand, which began as an umbrella organization consisting of more conservative elements of Lebanon's Shiite community, was born in 1982 in reaction to Israel's invasion and occupation of South Lebanon. As the Amal-initiated "War of the Camps" against the PLO ended, Hezbollah and its rival Amal began clashing in South Lebanon and in Beirut's southern suburbs.