The meaning behind Mexico’s flag

The flag of Mexico (Bandera de México) is a vertical tricolor of green, white, and red with the national coat of arms charged in the center of the white stripe. The coat of arms has an eagle, holding a serpent in its beak and talon, is perched on top of a prickly pear cactus growing out of rocks in the middle of a lake. A wreath of oak and laurel tied with a ribbon in the national green-white-red colors is below the eagle.
Green: signifies hope and prosperity
White: represents peace and harmony
Red: symbolizes the blood of Mexican heroes
An eagle holding a snake in its beak perched on a cactus plant was the symbol, based on legend, that the Aztecs looked for when finding the location to build their “sacred” city. They apparently found this site one day and built Tenochtitlan. This city was conquered and eventually destroyed by Hernan Cortez, a Spanish explorer/conqueror. The city was rebuilt and is now called Mexico City.
The official name of Mexico is Estados Únidos Mexicanos
Don't be surprised if you get funny looks when you tell people in Mexico . . .