Anniversary: Israel Invades Lebanon (1982)

On June 6, 1982, Israel invaded Lebanon in an "incursion" to push back the PLO that ended only in 2000, when Israel finally departed Lebanon after a 17-year struggle against Hezbollah. An invasion presumably intended to defeat Israel's Palestinian opponent and possibly to seize Lebanon's Litani River ended with the Palestinian resistance continuing, a new Lebanese enemy created, and the Litani still in Lebanese hands...after 18 years of quagmire.