 On 2 December 1971 , Dubai , together with Abu Dhabi , Sharjah , Ajman , Umm Al Qawain and Fujairah joined in the Act of Union to form the United Arab Emirates . The seventh emirate , Ras Al Khaimah , joined the UAE on 10 February 1972 , following giant non @-@ Arab neighbour Iran 's annexation of the RAK @-@ owned <unk> islands . 
