Complex sentence: In August 1944, after the Normandy landings, General Stanisław Maczek's 1st Armoured Division distinguished itself at the Battle of Falaise and in September General Stanisław Sosabowski's Parachute Brigade fought hard at the Battle of Arnhem.
Split into simpler sentences: In August 1944, after the Normandy landings, General Stanisław Maczek's 1st Armoured Division distinguished itself at the Battle of Falaise. In September General Stanisław Sosabowski's Parachute Brigade fought hard at the Battle of Arnhem.