When Did the Mexican Flag Fly Over Texas? Key Dates

The Mexican flag flew over Texas during the period of Mexican sovereignty:

• 27 Sep 1821: Mexico gains independence from Spain; Texas becomes part of Mexico.
• 2 Oct 1835: Texas Revolution begins (Battle of Gonzales).
• 2 Mar 1836: Texas Declaration of Independence; Mexican sovereignty ends.

Thus, the Mexican flag flew over Texas for ~4.5 years (1821–1836), though effective control weakened during the revolution.