in the Six Day War against Israel, which however ended in an Israeli victory and the capture of the West Bank and East Jerusalem. The period following the war saw an upsurge in the activity and numbers of Arab Palestinian paramilitary elements (fedayeen) within the state of Jordan. These distinct, armed militias were becoming a "state within a state", threatening Jordan's rule of law. King Hussein's armed forces targeted the fedayeen, and open fighting erupted in June 1970. The battle in which Palestinian fighters from various Palestine Liberation Organization (PLO) groups were expelled from Jordan is commonly known as Black September.
The heaviest fighting occurred in northern Jordan and Amman. In the ensuing heavy fighting, a Syrian tank force invaded northern Jordan to back the fedayeen fighters, but subsequently retreated. King Hussein urgently asked the United States and Great Britain to intervene against Syria. Consequently, Israel performed mock air strikes on the Syrian column at the Americans' request. Soon after, Syrian President Nureddin al-Atassi, ordered a hasty retreat from Jordanian soil. By 22 September, Arab foreign ministers meeting in Cairo arranged a cease-fire beginning the following day. However, sporadic violence continued until Jordanian forces, led by Habis Al-Majali, with the help of Iraqi forces, won a decisive victory over the fedayeen on July 1971, expelling them, and ultimately the PLO's Yasser Arafat, from Jordan.
In 1973, allied Arab League forces attacked Israel in the Yom Kippur War, and fighting occurred along the 1967 Jordan River cease-fire line. Jordan sent a brigade to Syria to attack Israeli units on Syrian territory but did not engage Israeli forces from Jordanian territory. At the Rabat summit conference in 1974, Jordan was now in a more secure position to agree, along with the rest of the Arab League, that the PLO was the "sole legitimate representative of the [Arab] Palestinian people", thereby relinquishing
