Final answer:
Spanish officials responded to filibusters in East Texas by using military force to repel the invaders and reinforce their territorial claims. Expeditions led by people like James Long were thwarted, and Long himself was ultimately arrested and killed by Spanish authorities. The Spanish response was part of a broader effort to protect their American colonies from US expansionist ambitions.
Step-by-step explanation:
The early 19th century saw multiple filibuster expeditions into Spanish territories, including East Texas. These filibusters, or private individuals leading unauthorized military campaigns, were intent on expanding the American empire of slavery. Spanish officials reacted to these invasions by mobilizing military forces to drive out the invaders and maintain control over their territories.
For instance, in the summer of 1819, James Long led an expedition to take control of Texas but was repulsed by Spanish troops a month later. Spanish forces also arrested Long on his second attempt in 1820, demonstrating Spain's resolve to protect its possessions from American expansionists. However, despite the risk of confrontation with Spanish forces and adverse legal actions, American citizens continued to engage in filibustering activities, driven by a belief in White supremacy and a desire to annex new territories for slavery.