NB: Skimming that article right now, the bombing seems to have pre-dated Hezbollah (generally given to have formed in 1985), though Iran's hand in affairs is fairly likely, and "Islamic Jihad" may have been a label adopted by Hezbollah or a nascent precursor group. The event is somewhat coupled to events in Palestine given the PLO's involvement in Beirut.
<https://en.wikipedia.org/wiki/1983_Beirut_barracks_bombings>
(As I've said: all sides here.)
NB: Skimming that article right now, the bombing seems to have pre-dated Hezbollah (generally given to have formed in 1985), though Iran's hand in affairs is fairly likely, and "Islamic Jihad" may have been a label adopted by Hezbollah or a nascent precursor group. The event is somewhat coupled to events in Palestine given the PLO's involvement in Beirut.