From the Overview: "Hezbollah ('Party of God') is an Iran-backed Lebanese Shi'a militia and U.S.-designated Foreign Terrorist Organization (FTO). Formed in 1982, in the wake of the Israeli invasion of southern Lebanon, the group has described itself as the leader of Islamic resistance to Israel and has conducted numerous attacks against Israeli and Western targets. Hezbollah currently operates regionally as a militia force, while also playing a powerful role as a Lebanese political party and provider of social services."
CRS In Focus, IF10703
Congressional Research Service: https://crsreports.congress.gov/