An attack by the Phalangist resistance kills 26 militia members of the Popular Front for the Liberation of Palestine, marking the start of the 15-year Lebanese Civil War.

The 1975 Beirut bus massacre, also known as the Ain el-Rammaneh incident and Black Sunday, was the collective name given to a short series of armed clashes involving Phalangist and Palestinian elements in the streets of central Beirut, which is commonly presented as the spark that set off the Lebanese Civil War in the mid-1970s.

The Kataeb Party, officially the Kataeb Party – Lebanese Social Democratic Party, also known as the Phalangist Party, is a right-wing Christian political party in Lebanon founded by Pierre Gemayel in 1936.

The Popular Front for the Liberation of Palestine is a secular Palestinian Marxist–Leninist organization founded in 1967 by George Habash. It has consistently been the second-largest of the groups forming the Palestine Liberation Organization (PLO), the largest being Fatah.

The Lebanese Civil War was a multifaceted armed conflict that took place from 1975 to 1990. It resulted in an estimated 150,000 fatalities and led to the exodus of almost one million people from Lebanon.