helotism
helotage

"I suggest it might be partly Helotism as well, the creature-ship seemed to have a Master/Slave relationship with the T'kaan."

It is certain that one aspect of helotism was the element of conquest; thus Messenians, who were conquered in the Messenian Wars of the 8th century BC, become synonymous in Herodotus with helots.

This acquisition of a large piece of territory and a large conquered population seems to have both provided the basis for the system of helotage and required the existence of a large military force to keep the potentially rebellious Messenians under control.