Simplify the following text for a Grade 11 native English-speaking person.
Original: Iwami Ginzan Silver Mine was located between Amago clan territory and Masuda clan territory , so there were many battles between these lords for the siver of vast quantity .
Simplified: Iwami Ginzan Silver Mine was in between Amago clan territory and Masuda clan territory , so there were many battles between these lords for the large amount of silver .