It was widely regarded as an ally, despite public denials, of Israel in the Lebanese Civil War.
The influence of the Phalangists was very limited in the early years of Lebanon's independence, but came to prominence as a champion of the Christian cause in the civil war of 1958. In the aftermath of the war, Pierre Gemayel was appointed to the cabinet, and two years later, was elected to the National Assembly. By the end of the decade, the Phalangists held 9 seats in the 99-member National Assembly, making it one of the largest groupings in Lebanon's notoriously fractured political system.
In the 1970s, the Phalangists built a private army, which by 1976 was led by Bashir Gemayel, Pierre Gemayel's son. Bashir Gemayel was elected President the Republic by the National Assembly in 1982, following the Israeli invasion. He was assassinated less than a month later, and was succeeded by his brother, Amin Gemayel. Amin was widely regarded at the time as possessing neither the charisma and military skill of his brother Bashir, nor the consummate political experience of his father Pierre, and had difficulty rallying the nation and the Phalange Party around him. Undoubtedly, however, he did his best in extraordinarily difficult circumstances.
In September 1982, a massacre of Palestinians at the Sabra and Shatilla refugee camp took place. Israel and the Phalangists were widely accused of responsibility, but neither accusation has been proved.
When President Amin Gemayel's term ended in 1988, he went into exile. The Phalange Party, lacking direction, broke down into several rival factions. The party is still a significant player on the political scene, despite being divided into two separate factions that virtually amount to separate parties, one being led by Amin Gemayel and the other by Karim Pakradouni. There is a possibility that the radical elements of the party will unite in the future son. Bashir Gemayel was elected President the Republic by the National Assembly in 1982, following the Israeli invasion. He was assassinated less than a month later, and was succeeded by his brother, Amin Gemayel. Amin was widely regarded at the time as possessing neither the charisma and military skill of his brother under the leadership of Nadim Bachir Gemayel, son of the late Bashir Gemayel.