Red flag with white stripe along hoist, width 1/4 of the flag length

United Arab Emirates

three equal horizontal bands of green (top), white, and black with a wider vertical red band on the hoist side; the flag incorporates all four Pan-Arab colors, which in this case represent fertility (green), neutrality (white), petroleum resources (black), and unity (red); red was the traditional color incorporated into all flags of the emirates before their unification

Background

The Trucial States of the Persian Gulf coast granted the UK control of their defense and foreign affairs in 19th century treaties. In 1971, six of these states - Abu Zaby, ‘Ajman, Al Fujayrah, Ash Shariqah, Dubayy, and Umm al Qaywayn - merged to form the United Arab Emirates (UAE). They were joined in 1972 by Ra’s al Khaymah. The UAE’s per capita GDP is on par with those of leading West European nations. Its generosity with oil revenues and its moderate foreign policy stance have allowed the UAE to play a vital role in the affairs of the region. For more than three decades, oil and global finance drove the UAE’s economy, however, in 2008-09, the confluence of falling oil prices, collapsing real estate prices, and the international banking crisis hit the UAE especially hard.

Source CIA The World Factbook - United Arab Emirates