Simplify the following text for a Grade 10 native English-speaking person.
Original: The term Zakarid Armenia , is used to describe territories of Armenia given to the Zakarid-Mxargrzeli princes as a fief by Tamar , the queen of the Kingdom of Georgia .
Simplified: The Zakarid Armenia , is made to describe territories of Armenia given to the Zakarid-Mxargrzeli princes as a fief by Tamar , the queen of the Kingdom of Georgia .