Complex sentence: The Battle of Curlew Pass was fought on the 15th of August 1599, during the Nine Years War (Ireland), between an English force under Sir Conyers Clifford and a rebel Irish force led by Red Hugh O'Donnell.
Split into simpler sentences: The Battle of Curlew Pass was fought on the 15th of August 1599, during the Nine Years War (Ireland). The battle was fought between an English force under Sir Conyers Clifford and a rebel Irish force led by Red Hugh O'Donnell.