Fatah is a secular and social democratic political party in Palestine that has been the leading party in the Palestine Liberation Organization. Founded by Yasser Arafat in 1959 as a political movement and in 1965 as a party, Fatah led a number of militant groups in a terrorist and guerrilla struggle against Israel for decades, seeking to establish an independent Palestinian state through bloodshed. After the 1993 Oslo Accords, Fatah moderated its stance, believing in a "two-state solution", but Fatah maintained some paramilitary groups such as the Al-Aqsa Martyrs' Brigades and the Tanzim, taking part in the intifada struggles. The group had a strength of 8,000 fighters and 300 politicians by 2016, and it was based out of the West Bank in Ramallah, claiming that the divided city of Jerusalem was their capital. They lost the Gaza Strip to Hamas in 2009, but decided upon a unity government with Hamas in January 2017.