The Flag of Ukraine

The origins of the blue and yellow colors as symbols for Ukraine can be traced back to the 12th century, during the time of the Kingdom of Galicia–Volhynia. However, the modern flag in its current form was first used as a symbol of independence during the Ukrainian War of Independence in 1917-1921. After a period of prohibition under Soviet rule, the flag was officially adopted by the Ukrainian parliament as the national flag on September 4, 1991, following Ukraine's declaration of independence from the Soviet Union on August 24, 1991.