He was held in such high regard as poets Mahmoud Darwish, Samih al-Qasim and Tawfiq Ziad, or as they are collectively called, the "Big Four in Palestinian Poetry.

He was elected as a member of the Joint Palestinian-Lebanese Forces Military Command in the area south of Beirut during the beginning of the 1976 Lebanese Civil War.

[citation needed] He worked as a Jordanian postal employee and translated the novel Around the World in 80 Days by Jules Verne into Arabic.

The poetry of Manasirah was influenced by the place where he grew up, where he had a close connection with the mythology, popular culture and lifestyle associated with the region's long history, from the emergence of Canaanites in the Bronze Age to the modern era.

During the Cairo phase, he won the 1968 Egyptian University Prize in Poetry, when it was first awarded to action poems, which were still not recognized as a poetic pattern by the dominant generation of traditional poets at the time.

In the aftermath of the war, he volunteered for military training by the Palestine Liberation Army (PLA) in Egypt, where the core of armed popular Palestinian resistance had begun to expand.

[9] However, Manasirah had begun his regimental career when he volunteered in the military course at Cairo University, summer 1967, after the Six-Day War.

Al-Nasir lived through the bloody events of Black September between Palestinian organizations and the Jordanian regime, but was not involved despite his cultural activity in support of Tahrir.

Following Black September, he was harassed by security authorities, as were many Palestinian and Jordanian figures supporting the work and the Liberation Organization, and was forced to leave for Beirut on 14 March 1974.

He was elected as a member of the Joint Palestinian-Lebanese Forces Military Command in the area south of Beirut during the beginning of the 1976 Lebanese Civil War.

In June 1976, Manasirah led the Battle of the Mills, to ease the siege of the Tel Zaater camp, which was destroyed on 12 August 1976 and abandoned its people.

He then left on a Greek ship by sea to Tartus, Syria, with the forces of the Palestine Liberation Organization (PLO).