Why do almost all Middle Eastern flags contain the colors black, green, red, and white?
The Pan-Arab colors are black, white, green, and red, and individually have their origins in the flags of prominent empires, and dynasties in Arab history. They were first combined in the flag of the Arab Revolt in 1916. They are used currently in the flags of Jordan, Kuwait, Palestine, the Sahrawi Arab Democratic Republic, Somaliland, Sudan, and the United Arab Emirates. A sub-set of the Pan-Arab colors are the Arab Liberation colors, in which green is less significant. These appear on the flags of Egypt, Iraq, Syria, Yemen, and formerly of Libya. It is believed that each color of the four Pan-Arab colors represent a certain Arab dynasty, or era: the black was the color of the flag of the Islamic prophet Muhammad, and of the Abbasid Caliphate; white was used by the Umayyad Caliphate; green was used by the Fatimid Caliphate as a reminder of the Battle of Badr to symbolize their support of Ali Bin Abi Talib; red was the flag held by the Khawarij, and then became the symbol of rulers in
