In May 1915, a German U-boat torpedoed the British liner __________ on its way from New York to England.

To preserve a precarious __________ in Europe and other parts of the world, Great Britain, Germany, and other nations formed alliances with other states that resulted in the Central Powers on the one side and the Allies on the other.

By August 1920 enough states ratified the __________ to allow women to vote in that year's presidential election.

The __________ were an alliance of Germany, Austria-Hungary, and the Ottoman Turkey during World War I.

Under the command of General John J. Pershing led __________ into battle during World War I.

Around a half-million blacks quit agricultural work and domestic labor to seek jobs in southern and northern cities in a diaspora taht contemporaries called the __________.

The __________ increased levies on the wealthy in accord with the just-ratified Sixteenth Amendment.

Roosevelt and other Republicans supported the __________, an organization which warned against foreign threats and advocated military training for young men in view of the war in Europe.

Wilson's fourteenth point called for the creation of a new "association of nations" which soon took form as the __________.

The __________ expanded the definition of treason to prohibit most public and private utterances of words or ideas deemed as interference with the war effort and included a postal censorship program that banned delivery of newspapers that questioned the justice of the war effort.

In 1917, Congress passed the __________ that barred the entry of any persons unable to read in their own language.

The __________ granted railroad workers an eight-hour work day.