Sheikh Mohammed bin Thani was born in
Fuwayrit, Qatar, by his father and predecessor to the throne, Sheikh
Thani bin Mohammad with Sheikh Mohammed being the second eldest son of his father, along with his four siblings. In May 1851, Faisal launched his third attempt to capture Bahrain, ordering his forces to proceed towards Al Bidda, Qatar, which was intended to be used as a staging area for an invasion of Bahrain. In response, Ali bin Khalifa, the Bahraini representative in Qatar, called on all men of fighting age to defend Al Bidda, as well as sending for help from
Saeed bin Tahnun Al Nahyan of
Abu Dhabi. Mohammed bin Thani served as one of the leaders of the Qatari forces, alongside his son. Qatari and allied forces were embroiled in three days of heavy fighting with Faisal's forces in the
Battle of Mesaimeer from 2 June to 4 June 1851. On the second day, the Bahraini and Abu Dhabi forces retreated to their ships, refusing to render further aid to the Qataris. Shortly after the battle ended, Mohammed bin Thani negotiated a separate peace agreement with Faisal in which he agreed to be under Wahhabi governance provided that he remains chief of Al Bidda, which Faisal agreed. On 8 June, Qatari forces under the leadership of Mohammed bin Thani assumed control of Burj Al-Maah, a watchtower guarding Doha's main water source, close to Al Bidda Fort where the allied forces of Ali bin Khalifa and Saeed bin Tahnoun were stationed. Upon hearing the news, they fled to Bahrain without incident, much to the dismay of Faisal who admonished Mohammed bin Thani for not capturing them. On 25 July 1851, Saeed bin Tahnun successfully negotiated a treaty between the Bahrainis and Wahhabis, in which the Bahrainis would pay an annual
zakat to Faisal in exchange for his renouncement of any claims to Qatar and return of Al Bidda to the chieftainship of Ali bin Khalifa. Mohammed bin Thani, as party to this agreement, agreed to relinquish his position. The battle created political enmity between Qatar and Bahrain which contributed to the
Qatari–Bahraini War in 1867 and Qatar's subsequent emergence as an independent political entity, which came to fruition on 12 September 1868 with the signing of a treaty between Mohammad bin Thani and the British representative
Lewis Pelly. In 1871, Sheikh Mohammed made a plea for protection against any external attack to the
Ottomans at Al Hasa. However, the Ottomans were the ones who displayed hostility to the Qataris in the same decade of his plea.
Death Sheikh Mohammed died of natural causes on 18 December 1878. His date of death is a national day in Qatar. ==Children==