Flag of the Republic of the Rio Grande - Historical Symbol of Texan Secession #1441288 (License: Personal Use)

This flag was adopted by the Republic of the Rio Grande, a breakaway state that existed from January to November 1840 in present-day Texas, Coahuila, Nuevo León, and Tamaulipas. Its design features two equal horizontal bands-green (top) and red (bottom)-with a large white circle centered at the division, symbolizing unity and sovereignty. Though short-lived, the republic played a key role in regional resistance to Antonio López de Santa Anna’s centralized government.

Used on historical websites, museum exhibits, educational resources about Texas/Mexican border conflicts, and genealogical or local history pages; matches user intent seeking visual identification or background on 19th-century separatist movements in North America.