The answer is B since the natives immune system was weak to the diseases.
Total War: Military conflict in which the contenders are willing to make any sacrifice in lives and other resources to obtain a complete victory.
Ndependence (1810–1821) Mexico Mexican Insurgents European Volunteers Mexican Ex-Royalists Army of the Three Guarantees
Long Expedition (1819) First Mexican Empire Army of the Three Guarantees
Texas–Indian Wars (1820–1875) First Mexican Empire Spain United States Texas Choctaw Republic
Citizen Genêt Affair, incident precipitated by the military adventurism of Citizen Edmond-Charles Genêt, a minister to the United States dispatched by the revolutionary Girondist regime of the new French Republic, which at the time was at war with Great Britain and Spain.
The Spain has suffered its greatest setbacks at the hands of
the Native Americans called the Aztecs. The Aztecs were known to dominate the
states that were close to them in which they also permits their ruler in having
to impose their ideals and as well as their religion.