(A) Great Britain was unable to gain control of the Dardanelles.
(B) ** Germany was unable to defeat France quickly at the outset of war in 1914.
(C) Austria-Hungary was unable to suppress nationalist rebels.
(D) Russia was unable to suppress a communist revolution.
EXPLANATIONS BELOW
Concept note-1: -The Schlieffen Plan’s strategy required that France be defeated swiftly – but this didn’t happen. That failure led to sustained trench warfare on the Western Front. In those grim battles of attrition, such as the Battle of the Somme and the Battle of Verdun, Allied forces ultimately outnumbered the Germans.
Concept note-2: -The Schlieffen Plan, devised by Germany, was intended to force France into submission and then invade Russia. It didn’t work because Russian troops attacked Germany while German troops were busy invading France.
Concept note-3: -Prior to World War I, The Schlieffen Plan established that, in case of the outbreak of war, Germany would attack France first and then Russia. Instead of a ‘head-on’ engagement, which would lead to position warfare of inestimable length, the opponent should be enveloped and its armies attacked on the flanks and rear.