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. In early 1968, however, Fatah guerrillas began raiding Israel from bases on the Jordanian side of the river. Most of these attacks were blocked by the Israel Defense Forces. At times, Jordanian Army infantry and artillery units gave the Fatah squads covering fire, leading to frequent direct skirmishes between the IDF and the Jordanian Army.