“In 1982, before Hezbollah existed, Israel invaded Lebanon to root out Palestinian guerrillas. Israeli Defense Minister Ariel Sharon envisioned an operation aimed at “transforming Lebanon into a reliable ally,” assassinating Palestinian leadership, expelling Palestinians, and eventually overthrowing the government of Jordan, according to Rise and Kill First by Ronen Bergman.
After Israeli forces stormed Beirut, the Lebanese capital, they successfully installed their ally, Bachir Gemayel, as prime minister and forced the Palestine Liberation Organization to withdraw from the country. (U.S. Marines were sent to oversee the Palestinian withdrawal.) But Gemayel was assassinated by one of his own countrymen, and a new militia called Hezbollah emerged to fight both the Israeli and U.S. presence.”