Lorraine Campaign and Operation Undertone both occurred during which war?
Operation Undertone Operation Undertone was a large assault by the U.S. Seventh and French 1st Armies of the U.S. Sixth Army Group as part of the Allied invasion of Germany in March 1945 during World War II.
Second Battle of the Aisne The Second Battle of the Aisne (French: "Bataille du Chemin des Dames" or "Seconde bataille de l'Aisne" , 16 April – mid-May 1917) was the main part of the Nivelle Offensive, a Franco-British attempt to inflict a decisive defeat on the German armies in France. The strategy was to conduct sequenced offensives from north to south, by the British Expeditionary Force (BEF) and several French army groups. General Robert Nivelle planned the offensive in December 1916, after he replaced Joseph Joffre as Commander-in-Chief of the French Army. The objective of the attack on the Aisne was to capture the prominent 80 km , east–west ridge of the Chemin des Dames, 110 km north-east of Paris, and then attack northwards to capture the city of Laon. When the French armies met the British advancing from the Arras front, the Germans would be pursued towards Belgium and the German frontier. The offensive began on 9 April, when the British attacked at the Battle of Arras. On 16 April, the "Groupe d'armées de Reserve" (GAR) attacked the Chemin des Dames and the next day, the Fourth Army of "Groupe d'armées de Centre" (GAC), near Reims to the south-east, began the Battle of the Hills.