(A) The introduction of fresh troops weakened the Allied Powers war efforts.
(B) The Central Powers were able to gain control of the war while the American soldiers were disorganized.
(C) The Allies were unable to support the number of troops the United States brought to the front lines.
(D) ** The addition of American troops and supplies tipped the war in favor of the Allies.
EXPLANATIONS BELOW
Concept note-1: -Although World War I began in 1914, the United States did not join the war until 1917. The impact of the United States joining the war was significant. The additional firepower, resources, and soldiers of the U.S. helped to tip the balance of the war in favor of the Allies.
Concept note-2: -The entry of the United States was the turning point of the war, because it made the eventual defeat of Germany possible. It had been foreseen in 1916 that if the United States went to war, the Allies’ military effort against Germany would be upheld by U.S. supplies and by enormous extensions of credit.
Concept note-3: -The US entered World War I because Germany embarked on a deadly gamble. Germany sank many American merchant ships around the British Isles which prompted the American entry into the war.
Concept note-4: -The American Expeditionary Forces arrived in Europe in 1917 and helped turn the tide in favor of Britain and France, leading to an Allied victory over Germany and Austria in November 1918. By the time of the armistice, more than four million Americans had served in the armed forces and 116, 708 had lost their lives.
Concept note-5: -The United States later declared war on German ally Austria-Hungary on December 7, 1917. Germany’s resumption of submarine attacks on passenger and merchant ships in 1917 became the primary motivation behind Wilson’s decision to lead the United States into World War I.