Complex sentence: The Battle of Shrewsbury was fought on July 21,1403, between an army led by the Lancastrian King, Henry IV, and a rebel army led by Henry "Hotspur" Percy from Northumberland.
Split into simpler sentences: The Battle of Shrewsbury was fought on July 21,1403. It was between an army led by the Lancastrian King, Henry IV, and a rebel army led by Henry "Hotspur" Percy from Northumberland.