(A) joined the Allies at the beginning of the war.
(B) joined the Central Powers at the beginning of the war.
(C) ** joined the Allies 3 years after the start of the war.
(D) joined the Central Powers 3 years after the start of the war.
EXPLANATIONS BELOW
Concept note-1: -During World War II, the United States began to provide significant military supplies and other assistance to the Allies in September 1940, even though the United States did not enter the war until December 1941.
Concept note-2: -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.
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: -World War II the chief Allied powers were Great Britain, France (except during the German occupation, 1940–44), the Soviet Union (after its entry in June 1941), the United States (after its entry on December 8, 1941), and China. More generally, the Allies included all the wartime members of the United…
Concept note-5: -The major Allied powers in World War I were Great Britain (and the British Empire), France, and the Russian Empire, formally linked by the Treaty of London of September 5, 1914.