Tricolour (flag) orange-white-blue design of the Prince's Flag ("Prinsenvlag", predecessor of the flags of the Netherlands and Luxembourg), used from 1579 by William I of Orange-Nassau in the Eighty Years' War, establishing the independence of the Dutch Republic from the Spanish Empire. Though not the first tricolour flag, one of the most famous, known as "Le Tricolore", is the blue, white and red (whence also called "Le Bleu-Blanc-Rouge") flag of France adopted in the French Revolution. With the formation of French client republics after 1795, the revolutionary tricolour was exported and adopted more widely in Europe, by the Republic of Alba 1796
Flag of Sudan Flag of Sudan The current flag of Sudan () was adopted on 20 May 1970 and consists of a horizontal red-white-black tricolour with a green triangle at the hoist. The flag is based on the Arab Liberation Flag shared by Egypt, Iraq, Syria and Yemen that uses a subset of the Pan-Arab colours in which green is less significant. Prior to the 1969 military coup of Gaafar Nimeiry, a blue-yellow-green tricolour design was used. According to "World Flags 101": In 1881, at the beginning of the Mahdist War, the Mahdi Muhammad Ahmad appointed Abdallahi ibn Muhammad as one of his