MEXICO FLAG

The national flag of Mexico (Spanish: Bandera de Mexico) is a vertical tricolor of green, white, and red with the national coat of arms charged in the center of the white stripe. While the meaning of the colors have changed over time, these three colors were adopted by Mexico following independence from Spain during the country's war of independence, and subsequent first Mexican Empire. 

Red, white and green are the colors of the national army in Mexico. the central emblem is the Mexican coat of arms, based on the Aztec symbol for Tenochtitlan (now Mexico city), the center of the Aztec empire. it recalls the legends of an eagle sitting on a cactus while devouring a serpent that signaled to the Aztecs where to find their city, Tenochtitlan.