September 16, 1810.
1847
They declared independence from mexico
Spain
Texas
Washington-on-the-Brazos
This is a trick question. Mexico didn't declare independence until 1810 (from Spain).
Declared: September 16, 1810. Won: September 27,1821.
Declared: 1810Internationally recognized: 1821
Central America
Modern Mexico was established on September 15, 1810 when it declared its independence from Spain.
Mexico declared its independence from Spain on September 16, 1810. After a bloody and long independence war, Mexico achieved its independence on September 27, 1821.
Declared: 1810Recognized: 1821
When they declared their independence, on September 15, 1810