Mexico’s flag, officially adopted in 1968, has been used in Mexico since 1821 when the first national flag was created. The specific meaning of the colors of the flag, red, white and green, have changed over time, but the colors were adopted by Mexico when it gained independence from Spain during Mexico’s War of Independence. The colors were used by the National Liberation Army. The Coat of Arms at the center of the banner is based on the Aztec symbol for Tenochtitlan, an ancient capital city, which is now Mexico City. The Coat of Arms depicts an eagle perched on a prickly pear cactus holding a snake in its talon. The Coat of Arms refers to the Aztec legend of the Gods identifying where the Aztecs should build their city.