Dubai and Abu Dhabi

"Although the ruler of Dubai, Sheikh Mohammed bin Rashid Al Maktoum, recently told journalists to "shut up" and stop referring to Dubai and Abu Dhabi as being separate, and although the Al Maktoum family is of the same tribe as Abu Dhabi's ruling Al Nahyan family - the Bani Yas - the two dynasties nonetheless have a long history of rivalry. In 1833, Dubai broke away from Abu Dhabi and had to rely on British protection. Even in the 1940s, there was armed conflict between the two neighbours."