Fighting between Maronite and Palestinian forces began in 1975, and Left Wing, pan-Arabist and Muslim Lebanese groups later allied themselves with the Palestinians.[9] During the course of the fighting, alliances shifted rapidly and unpredictably: by the end of the war, nearly every party had allied with and subsequently betrayed every other party at least once.[citation needed] Furthermore, foreign powers, such as Israel and Syria, became involved in the war and fought alongside different factions. Peace keeping forces, such as the Multinational Force in Lebanon & UNIFIL, were also stationed in Lebanon.