Answer
Nasrallah has been the leader of Hezbollah since the 1990s. In 1992, he succeeded Abbas al-Musawi as the group's leader, and has led it ever since. Hezbollah is a Shia Islamist militant group that has been active in Lebanon since the 1980s. It has been involved in a number of conflicts, including the Lebanese Civil War, the Israel-Lebanon War of 2006, and the Syrian Civil War.