Palestine Liberation Organization
Founded as a result of the Israel–Palestine conflict, the PLO originally used violence and terrorism to try and defeat Israel and liberate the Palestinian territories. It was initially founded by Ahmad Shukeiri in 1964, but thrived under the leadership of Yasser Arafat from 1969 to 2004. Under Arafat, Fatah became the largest faction of the PLO. The group became involved in Black September, the Lebanese Civil War, the First Intifada, and the Second Intifada during the Arafat years. After the First Intifada, the PLO and Israel signed the Oslo Accords, creating the PNA and transitioning the PLO into a political party. Arafat died during the Second Intifada, causing Mahmoud Abbas to become the current leader.