what were the difficulties faced with colonization?
That France had established a colony in the area between New Spain and Florida, and this colony was a threat.
Spanish Texas
the Spanish learned that France had established a colony in the area between New Spain and Florida. Believing the French colony was a threat to Spanish mines and shipping routes, Spanish King Carlos II's Council of War recommended that "Spain needed swift action 'to remove this thorn which has been thrust into the heart of America. 
why did filibusters fight against spanish rule in texas UNANSWERABLE where is it located? Northeastern mainland region of the Viceroyalty of New Spain when did spanish colonize it? UNANSWERABLE what was the reason behind the dispute with france? For impetus for Spain's interest in Texas
wiki:13843787
Spanish Texas [SEP] Initial colonization attempts
Although Alonso Álvarez de Pineda claimed Texas for Spain in 1519, the area was largely ignored by Spain until the late seventeenth century. In 1685, the Spanish learned that France had established a colony in the area between New Spain and Florida. Believing the French colony was a threat to Spanish mines and shipping routes, Spanish King Carlos II's Council of War recommended that "Spain needed swift action 'to remove this thorn which has been thrust into the heart of America. The greater the delay the greater the difficulty of attainment.'" Having no idea where to find the French colony, the Spanish launched ten expeditions—both land and sea—over the next three years.