However, Qatari-Ottoman relations soon stagnated, and in 1882 they suffered further setbacks when the Ottomans refused to aid Al Thani in his expedition of Abu Dhabi-occupied Al Khor.
In 628, Muhammad sent a Muslim envoy to a ruler in Eastern Arabia named Munzir ibn Sawa Al Tamimi and requested that he and his subjects accept Islam.
Munzir obliged his request, and accordingly, most of the Arab tribes in the region converted to Islam.
In June 2017, Saudi Arabia, Bahrain, the United Arab Emirates, and Egypt, among other Gulf states, cut off diplomatic relations with Qatar, accusing it of supporting and funding terrorism and manipulating internal affairs of its neighboring states, an escalation of longstanding tensions with Saudi Arabia.
Pliny the Elder, a Roman writer, documented the earliest account pertaining to the inhabitants of the Peninsula around the mid-first century AD, referring to them as the Catharrei, a designation which may have derived from the name of a prominent local settlement.
The Al Khalifa were effectively returned to power thereafter.
As punishment for piracy, an East India Company vessel bombarded Doha in 1821, destroying the town and forcing hundreds of residents to flee.
However, the Bahraini hostilities were in violation of the 1820 Anglo-Bahraini Treaty.
The joint incursion, in addition to the Qatari counterattack, prompted British political agent Lewis Pelly to impose a settlement in 1868.
Upon being made aware of advancements by the Egyptians on the western frontier in 1811, the Wahhabi amir reduced his garrisons in Bahrain and Zubarah in order to re-position his troops.