Complex sentence: The diplomats disappeared in Lebanon during the invasion of Lebanon in 1982 on the highway between Jounieh and Beirut, after reaching the al-Barbareh checkpoint in northern Lebanon, Lebanese Phalange forces headed by Samir Geagea stopped the diplomats.
Split into simpler sentences: The diplomats disappeared in Lebanon during the invasion of Lebanon in 1982. On the highway between Jounieh and Beirut, after reaching the al-Barbareh checkpoint in northern Lebanon, Lebanese Phalange forces headed by Samir Geagea stopped the diplomats.