Simplify the following text for a Grade 7 native English-speaking person.
Original: The Battle of Finnburg was a battle between the Frisians and the Danes , mentioned in two early medieval writings , namely the Finnesburg Fragment and Beowulf .
Simplified: The Battle of Finnburg was a battle between the Frisians and the Danes . It was mentioned in two early medieval writings , the Finnesburg Fragment and Beowulf .