How did abu dhabi become an emirate?

Abu Dhabi became an emirate in the early 20th century when Sheikh Shakhbut bin Sultan Al Nahyan, a member of the ruling Al Nahyan family, became its leader in 1928. The discovery of oil in the 1950s significantly boosted the emirate's economy and development, leading to increased political significance. In 1971, Abu Dhabi joined with six other emirates to form the United Arab Emirates (UAE), solidifying its status as an emirate within the federation. Since then, it has played a crucial role in the UAE's political and economic landscape.