(A) Battle of Gettysburg
(B) ** Battle of the Marne
(C) D-Day
(D) Battle of the Bulge
EXPLANATIONS BELOW
Concept note-1: -By 10 September the German armies west of Verdun were retreating towards the Aisne. Joffre ordered Entente troops to pursue, leading to the First Battle of the Aisne (see below). The German retreat from 9–13 September marked the end of the Schlieffen Plan.
Concept note-2: -The spectacular victory of Hindenburg and Ludendorff over the Russians in August 1914 at Tannenberg, in East Prussia, a battle that brought Hindenburg worldwide renown, was followed by the German defeat on the Marne in the west that signaled the failure of Ludendorff’s revised Schlieffen Plan.
Concept note-3: -First Battle of the Marne, (September 6–12, 1914), an offensive during World War I by the French army and the British Expeditionary Force (BEF) against the advancing Germans who had invaded Belgium and northeastern France and were within 30 miles (48 km) of Paris.