The Black September Organization (BSO) (Arabic: , romanized: Munaamat Ayll al-Aswad) was a Palestinian militant organization founded in 1970. Besides other actions, the group was responsible for the assassination of the Jordanian Prime Minister Wasfi Tal, and the Munich massacre, in which eleven Israeli athletes and officials were kidnapped and killed, as well as a West German policeman losing his life, during the 1972 Summer Olympics in Munich, their most publicized event. These attacks led to the creation or specialization of permanent counter-terrorism forces in many European countries.

Wasfi Tal (Arabic: وصفي التل; also known as Wasfi Tell; 19 January 1919 – 28 November 1971) was a Jordanian politician, statesman and general. He served as the 15th Prime Minister of Jordan for three separate terms, 1962–63, 1965–67 and 1970 until his assassination in 1971.

Tal was born in Turkey to prominent Jordanian poet Mustafa Wahbi Tal. He moved to Jordan at 5 years old. He received his education in Al-Salt, later continuing his education at the American University of Beirut in 1941. He then joined the British Army in Mandatory Palestine after being trained in a British-run military academy, and joined the irregular Arab Liberation Army to fight against Israel during the 1948 Arab–Israeli War.Following the war, he served various positions in the Jordanian government, rising to higher positions after his abilities captured King Hussein's attention. His first tenure as prime minister in 1962 was short-lived, he resigned in 1963 over widespread criticism of his perceived pro-Western views. He was appointed prime minister again in 1965, which saw an improved climate of economic activity, but resigned just before the onset of the Six Day War in 1967. He was appointed again as prime minister in 1970 during Black September, the conflict which saw Palestine Liberation Organization fighters (fedayeen) expelled from Jordan. Earning the ire of PLO leaders for his role in the conflict, he was assassinated by the Black September group outside a Cairo hotel hosting an Arab League conference.Tal was reportedly loyal to King Hussein and popular with Jordanians for his success in expelling the fedayeen. Meanwhile, he was widely denounced by Arabs who had supported the fedayeen. His assassins were found innocent and released on bail by an Egyptian court.