The crown was aloof from the eagle's head and a serpent was positioned in the eagle's right talon. The new flag was selected for the republic in April of that year, the only changes being the entrance of the central emblem. The second national flag was accepted after the formation of the first federal republic in 1823. The imperial government that was set up selected a tricolor flag of green, white and red and charged with the national coat of arms. The first national flag was recognized in 1821, the first year of Mexican familiar dominion.
The military also used a comparable square flag, but the eagle was superior to on the national flag. Variations of this flag that seemed in this dated also comprised a naval flag that had the tricolor design, but only controlled the eagle with the crown overhead its head. Before the acceptance of the initial national flag, numerous historians reflect the first Mexican flag to be the typical of the Virgin of Guadalupe.