Complex sentence: In 1920 Percival served in Ireland against the Irish Republican Army (IRA) during the Anglo-Irish War, first as a company commander and later the intelligence officer of the 1st Battalion of the Essex Regiment, in Kinsale, County Cork.
Split into simpler sentences: In 1920 Percival served in Ireland, fighting the Irish Republican Army (IRA) during the Anglo-Irish War. There, he was a company commander and later the intelligence officer of the 1st Battalion of the Essex Regiment, in Kinsale, County Cork.