There are many rumors about the history of the Turkish flag. Some argue that the history of the Turkish flag dates back to the 1st Kosovo War, while others claim that it was used much earlier. The reason for this is that the moon and star on the Turkish flag were often used in Turkish and Islamic history. The flag used today was first raised after the 1st Kosovo War.
The first battle for Kosovo took place in 1389 between the Ottoman Empire and several Turkish principalities and the Balkan alliance led by Serbia. The war ended in victory for the Ottoman Empire, but thousands of people died in the war. According to legend, the moon and star reflected in the pools of blood that accumulated on the ground after the battle became the symbols of the Turkish flag. In addition to this legend, several different sources claim that on the day of the battle, July 28, 1389, a celestial event took place and Jupiter and the Moon aligned to form the Turkish flag.

It is not known how accurate the information is, but the use of the Turkish flag after this war was found in the 18th century in the Ottoman Empire, that is, during the reign of Selim III. The fact that the flag is approximately 400 years old makes us question the authenticity of the rumors about the Battle of Kosovo. If we look at the history of the Turkish flag only with reasoned conclusions, the Turkish flag was first used by Selim III in the 18th century in a form closest to its current appearance.
In 1844, by the decision of Abdülmejit during the Tanzimat period, the eight-pointed star on the Turkish flag became a five-pointed star. With the establishment of the Republic of Turkey, the shape of the Turkish flag was determined by the Grand National Assembly of Turkey on May 29, 1936. Then, on January 25, 1985, the size of the Turkish flag was determined by the Council of Ministers of the Republic of Turkey.