Simplify the following text for a Grade 6 native English-speaking person.
Original: From 457 to 486 , under Aegidius and his son Syagrius , Noviodunum was the capital of the `` Kingdom of Soissons '' , until it fell to the Frankish king Clovis I in the Battle of Soissons .
Simplified: Soissons was the capital of France into 486 , under the reign of Clovis .