The Ardre became a footnote in British military history as the river down the valley of which the British 51st and 62nd Divisions, with attached New Zealanders, fought in cooperation with French V Army forces on each flank and with Italian artillery support, in July 1918, during the Second Battle of the Aisne.
Second Battle of the Aisne (16 April–9 May 1917), main component of the Nivelle Offensive
Battle of Waterloo | Battle of Britain | Battle of the Somme | Battle of the Bulge | Battle of Gettysburg | Battle Creek, Michigan | Battle of France | Battle of Trafalgar | Aisne | Battle of Hastings | Battle of Antietam | battle | Battle of Shiloh | Battle of Midway | Battle of Belleau Wood | Battle of the Alamo | Battle of Leipzig | Battle of Agincourt | Battle of Verdun | Battle of Thermopylae | Battle of the Plains of Abraham | Battle of Vienna | Second Battle of the Marne | Second Battle of El Alamein | Battle of the Nile | Battle of the Boyne | Battle of Stalingrad | Battle of Austerlitz | The Last Battle | Kathleen Battle |
Successfully repulsing the French Champagne-Marne offensive from February–March and September–November 1915 respectively, Einem would take part in all three Battles of the Aisne and would hold Gen. Anthoine's 4th Army (under Gen. Philippe Petain's Center Army Group) during the Second Battle of the Aisne as part of the Nivelle Offensive from April 16-May 15, 1917.
The Germans had held the Chemin des Dames Ridge from the First Battle of the Aisne in September 1914 to 1917, when General Mangin captured it during the Second Battle of the Aisne (in the Nivelle Offensive).