The Battle of the Argenta Gap was an operation by British troops to breach German defences in northern Italy in April 1945 as part of the final Allied advance in Italy during the Second World War. The Gap was a heavily defended strip of dry land between Lake Comacchio and the Lombardy marshes blocking the route to the Lombardy plain and north-east Italy. The British 5th Corps used amphibious armoured vehicles to outflank the German positions and breach the Axis lines, allowing the British 6th Armoured Division to pass through the gap. Research Battle of the Argenta Gap