Lebanon has a population that is mainly Muslim (54%) and Christian (40%). The country was embroiled in a civil war from 1975-1990 and still has political divisions along religious lines. The highest government positions are reserved for specific religious groups. Hezbollah, which was formed during Israel's 1982 invasion of Lebanon, is a major political and paramilitary organization supported by Iran that still conflicts with Israel and has sent forces to support Iran in Iraq and Syria. The United States seeks to balance maintaining neutrality in Lebanon with countering groups hostile to its interests.