Simplify the following text for a Grade 7 native English-speaking person.
Original: The Battle of Bosworth Field ( or the Battle of Bosworth ) was the penultimate battle of the Wars of the Roses , the civil war between the House of Lancaster and the House of York that raged across England in the latter half of the 15th century .
Simplified: The Battle of Bosworth or Bosworth Field was an important battle during the Wars of the Roses in 15th century England .