The Chamorros of the Marianas Islands might have had slaves. archaeologists and anthropologists have not decided yet. When Magellan stumbled over the islands in 1521 there were two classes and one caste in the society here.

The matua were the upper class and the achaote were the lower class and included the children of the matua. Then there were the matachang who seem to have been a separate caste. No interrelationship was allowed between the upper two classes and the matachang. The two who ignored that were put to death. The matachang were not allowed to fish in the sea but could only eat freshwater fish and shellfish. They had to work for the achaote and matua and were required to bow very low when they encountered a matua and say something to the effect of "May I wash your feet?"

There are two theories. One is that the matachang were an earlier group who were on the island before the Chamorro came along. Supposedly the Chamorros conquered them.

The other theory is that they were slaves.