mission, with the last large-scale uprising in 1683.Intermittent warfare, plus the typhoons of 1671 and 1693, and in particular the smallpox epidemic of 1688, reduced the Chamorro population from 50,000 to 10,000, and finally to less than 5,000.

In the 1818 Spanish Census of the Spanish-Philippines, of which, the Marianas islands was under the governance of the Philippine Islands and Guam was part of the Marianas islands, it was recorded to have had 7,555 souls and of which there were 160 Spanish soldiers