In the 3rd millennium BC a culture known as Umm an-Nar (after the island where it was discovered) arose near modern Abu Dhabi. Umm an-Nar's influence extended well into the interior and down the coast of what is now Oman. Later regional influences included the Hellenic civilisations, the Kingdom of Hormuz and the Portuguese.
The rise of British naval power in the Gulf in the mid-18th century coincided with the rise of two important tribal confederations along the coast of the lower Gulf. These were the Qawasim, whose descendants now rule Sharjah and Ras al-Khaimah, and the Bani Yas, whose descendants are now the ruling families of modern Abu Dhabi and Dubai.
The Bani Yas were originally based in Liwa, an oasis on the edge of the Empty Quarter desert, but moved to Abu Dhabi in 1793. They engaged in the traditional Bedouin activities of camel herding and small-scale agriculture. The Bani Yas divided into two main branches in the early 19th century when Dubai split from Abu Dhabi.