sentences:  However, as the PLO's strength began to grow in the aftermath, the fedayeen began to speak openly of overthrowing the Hashemite monarchy, and the ensuing tensions with the Jordanian authorities eventually precipitated in their expulsion to Lebanon during the events of Black September in 1970.Palestinian groups used to initiate few attacks on Israeli targets from both the West Bank and Jordan before the Six-Day War, some of which caused Israel to retaliate which became known as the Reprisal operations.Following the seizure of the West Bank from Jordan in the June 1967 Six-Day War, Israel destroyed the existing Palestinian group Fatah networks there.