Britain formed the trucial states in 1871 which consisted of seven emirates. There was often fighting and disagreements between the emirates.
After the fall of Britain the seven emirates were left in conflict with each other. Many british survivor states claimed the area. Oman offered asistance to the Emirates.
Sheikh Zayed of the Abu Dhabi emirate met with the leader of The emirate of dubai Sheikh Rashid and they united there two emirates. Then they united more emirates and in 1968 formed the United Arab Emirates. A seventh emirate, Ras al-Khaimah joined in 1969.
It is the the fourth richest nation on earth.
The leader of Abu Dhabi is president and the leader of dubai is Prime minister.