When Napoleon sold the Louisiana Purchase to the United States in 1803, Spanish North America was divided.
Texas became an important border territory. There was just one problem—it had very little economy, and few organized communities.
After some time, presidio-mission complexes turned into actual towns. This brought about a larger military presence to protect the people and businesses. The Spanish military and Spanish law did not always treat the Texas colonists fairly. Almost everyone in Texas was unhappy under Spanish rule.