This future state declared its independence in 1836 during a war with Mexico
Following Texas' successful war of independence against Mexico in 
1836, ... through with its threat to declare war if the United States annexed Texas,
... [DOC] [TLE] Texas declares independence - Mar 02, 1836 - HISTORY.com [PAR] During the Texas Revolution, a convention of American Texans meets at ... March 
2, Texas' revolutionary government formally declared its independence from 
Mexico.