Complex sentence: When Israel invaded Lebanon in 1982, Mughniyeh was in Iran but hurried back to Beirut where he rejoined Fatah and participated in the defence of West Beirut and was wounded in the fighting.
Split into simpler sentences: When Israel invaded Lebanon in 1982, Mughniyeh was in Iran but hurried back to Beirut where he rejoined Fatah. He participated in the defence of West Beirut, where he was wounded in the fighting.