Operation Taqwa refers to the ground invasion of The United Arab Kingdom by The Caliphate of Sadati Arabia, under the command of Anwar al-Sadat. For almost a decade, Riyadh had pursued a policy of aggressive oil development, not only extracting and selling crude oil but also processing it in Arab refineries. On the other hand, its northern neighbours had diplomatically isolated themselves from the Muslim world by maintaining a large degree of secularity, from the East due to World War II and from the West due to the Suez Canal Crisis. Sadat's administration promoted enormous immigration from abroad, industrialism and profound military development, allowing them to go toe-to-toe with the still vastly numerically superior Regular Arab Army.
However, as much as Anwar Sadat presented an image of religious modernity and foreign openness, politics south of the border developed in a very different current than they did in the north. Salafi Jihadism was the ruling ideology of the Sadati regime, with government rhetoric being decidedly extremist in all aspects. The Cuban Missile Crisis and its ensuing standoff proved to be the distraction that they needed to conduct an all-out assault, with a holy war being declared on the 22nd of October, 1962. Regular Arab Army troops were slaughtered in the battlefield thanks to the unnerving brutality, technological modernity and religious zeal of Sadat's troops, as well as liberal use of chemical weapons, primarily the dreaded neurotoxic sarin gas against which conventional chemical defence equipment was useless.
Operation Taqwa was an astounding success, at least tactically. However, the international press began receiving testimonies and pictures of massacres, extrajudicial executions, sectarian witch hunts and other crimes against humanity, as well as a plethora of war crimes. In particular the Iraqi Shiite population was outright exterminated wherever Sadat's troops found them, a posture which became decidedly genocidal when they captured Baghdad. After this battlefield victory, the southern regime lost any modicum of credibility when Anwar Sadat crowned himself Caliph and renamed his nation Sadatland (or more precisely, the Sadat Caliphate). By early December the United Nations convened at New York and decided unanimously on an international military intervention.
This ground invasion is considered the opening phase of the Black Sand War, the most brutal conflict in the history of the Middle East.