It emerged with financial backing from Iran in the early 1980s and began a struggle to drive Israeli troops from Lebanon.
Hostility to Israel has remained the party's defining platform since May 2000, when the last Israeli troops left Lebanon due in large part to the success of Hezbollah's military arm, the Islamic Resistance.
Hezbollah's popularity peaked in the 2000s, but took a massive dent among pro-Western Lebanese people when it was at the centre of a huge, destructive war with Israel following the capture of two Israeli soldiers in 2006.