original: Oliver Cromwell attacked Drogheda in 1649 slaughtering the Royalist garrison (Siege of Drogheda).
simplifications: Oliver Cromwell attacked Drogheda in 1649 destroying the Royalist garrison. Oliver Cromwell attacked Drogheda in 1649 killing the Royalist troops. Oliver Cromwell attacked Drogheda in 1649, killing the Royalist garrison. This is known as the Siege of Drogheda. Oliver Cromwell attacked Drogheda in 1649. He murdered the Royalist garrison  in the Siege of Drogheda. Oliver Cromwell attacked Drogheda and killed the Royalist soldiers. Oliver Cromwell attacked Drogheda in 1648. He killed the Royalist garrison. In 1649, Oliver Cromwell attacked Drogheda. He slaughtered the Royalist garrison. Oliver Cromwell attacked Drogheda and slaughtered the Royalist garrison (Siege of Drogheda) in 1649. The Siege of Drogheda was when Oliver Cromwell killed the Royalist garrison in Drogheda in 1649. Oliver Cromwell attacked Drogheda in 1649. The Royalist garrison (Siege of Drogheda) was slaughtered during the attack.