USA HISTORY

*German unrstricted submarine warfare *Signing the Treaty of Versailles *Sinking of the Lusitania * Battle of Argonne Forest The events listed above are associated with which era in U.S. history?

(A) The Progressive Era

(B) American Expansionism

(C) The Roaring Twenties

(D) ** World War I

Concept note-1: -On 4 February 1915, Germany declared a war zone around Britain, within which merchant ships were sunk without warning. This ‘unrestricted submarine warfare’ angered neutral countries, especially the United States.

Concept note-2: -Germany retaliated by using its submarines to destroy neutral ships that were supplying the Allies. The formidable U-boats (unterseeboots) prowled the Atlantic armed with torpedoes. They were Germany’s only weapon of advantage as Britain effectively blocked German ports to supplies.

Concept note-3: -The United States later declared war on Austria-Hungary on December 7, 1917. Germany’s resumption of submarine attacks on passenger and merchant ships in 1917 was the primary motivation behind Wilson’s decision to lead the United States into World War I.