the invasion of Bahrain was completed on 28 July 1783 Other historians believe that the Kuwaitis invaded Bahrain because they were closer to it than to Zubarah and as such, would deliver a tactical defeat to the Persians and would later handover possession to the Bani Utbah clan. The most probable version, as put forward by Historian J. G. Lorimer, was that the invasion was led by Ahmed Al Fateh in 1783 and that he defeated Nasr Al-Madhkur in battle on the outskirts of Manama and plundered the town.Historians dispute the date of the invasion, some stating it occurred in 1782 while others say it was 1783. Ahmed al-Fateh ruled Bahrain and Zubarah, visiting the former in the summer and the latter in the winter, until his death in 1796. In 1797, fourteen years later after gaining the power of the Bani Utbah, the Al Khalifa family moved to Bahrain and settled in Jaww, later moving to Riffa. They were originally from Kuwait having left in 1766. Al-Sabah family traditions relates that the ancestors of their family and those of the Al-Khalifa family came to Kuwait after their expulsion from the Iraqi Umm Qasr town upon Khor Zubair by the Turks, an earlier base from which they preyed on the caravans of Basra and pirated ships in the Shatt al-Arab waterway. The first ruler of the Al Khalifa was Shaikh Ahmed Al-Fateh. Persian attempts to reconquer the island in 1783 and in 1785 failed; the 1783 expedition was a joint Persian-Qawasim invasion force that never left Bushehr. The 1785 invasion fleet, composed of forces from Bushehr, Rig and Shiraz was called off after the death of the ruler of Shiraz, Ali Murad Khan. Due to internal difficulties, the Persians could not attempt another invasion. In 1799, Bahrain came under threat from the expansionist policies of Sayyid Sultan, the Sultan of Oman, when he invaded the island under the pretext that Bahrain did not pay taxes owed. The Bani Utbah solicited the aid of Bushire to expel the Omanis on the condition that Bahrain would become a tributary state of Persia. In 1800, Sayyid Sultan invaded Bahrain again in retaliation and deployed a garrison at Arad Fort, in Muharraq island and had appointed his twelve-year-old son Salim, as Governor of the island. The Bani Utbah laid siege to Arad Fort later that year, ejecting Salim from power. In 1802, Sayyid Sultan