The term 'VIKING Serf' is a combination of two words, 'VIKING' and 'THRALL'. The term 'VIKING' refers to a member of the Scandinavian seafaring warriors who raided and colonized wide areas of Europe from the late 8th to the early 11th century. The term 'THRALL' refers to a person in a state of servitude or bondage, typically as a result of being captured in war or sold into slavery. Therefore, a VIKING Serf would be someone who was enslaved by the Vikings and forced to work for them.