On June 28, 1914 a Serbian nationalist shot and killed a member of a European royal family, and the crisis that followed pulled Europe into war. Who was killed?

Gavrilo Princip shot the heir to the Austro-Hungarian throne in June 1914 in the capital of Bosnia, a province Austria-Hungary had annexed in 1908. In which city did the assassination happen?

Which group of states fought World War I as the Central Powers?

Austria-Hungary blamed Serbia for the assassination, sent an ultimatum, and declared war on July 28, 1914. Which great power then mobilized in support of Serbia, widening the quarrel?

In 1914 the great powers of Europe were grouped into two rival blocs whose members had promised one another support. What were those two blocs called?

In August 1914 Germany's war plan sent its armies through a small neutral neighbor to reach France quickly, and that invasion brought Britain into the war. Which country did Germany invade?

Between 1906 and 1914 Britain and Germany raced to launch more dreadnought battleships than the other, and every major continental power enlarged its conscript army. Which long-term cause of the war does this describe?

Before 1914 Britain, France, Germany and Belgium claimed territory across Africa and Asia, competing for raw materials, markets and coaling stations, and clashing twice over Morocco. Which long-term cause is this?

Serbs, Czechs and other peoples inside Austria-Hungary wanted states of their own, and Serbia hoped to gather the South Slavs under its own flag. Which long-term cause of the war does this describe?

A quarrel between Austria-Hungary and Serbia had become a war involving Germany, Russia, France and Britain within about six weeks. Which feature of the prewar order best explains that spread?

European general staffs wrote mobilization timetables so detailed that leaders believed a mobilization once begun could not be halted, and generals pressed for early orders in July 1914. Which long-term cause does this show?

Weeks after the fighting began, Wilson asked Americans to be 'impartial in thought as well as in action.' What was he asking of them?

Wilson proclaimed neutrality in 1914, yet by 1916 American banks had lent Britain and France many times what they had lent Germany, and trade with the Central Powers had nearly stopped. What does that pattern show?

The British navy blockaded Germany, and by 1916 American exports to Britain and France had risen sharply while exports to Germany had nearly stopped. How did this affect American neutrality?

After Germany declared the waters around Britain a war zone in February 1915, Wilson warned that Germany would be held to 'strict accountability.' What did that warning mean?

Wilson ran for re-election in 1916 on a slogan that pointed to his record of keeping the country neutral. Which slogan was it?

The Lusitania, a British passenger liner sunk by a German submarine on May 7, 1915, went down with 128 Americans among the dead.

The sinking of the Lusitania in May 1915 outraged Americans and filled the newspapers. What did the United States actually do in the months that followed?

In March 1916 a German submarine torpedoed the Sussex, a French passenger ferry, and Wilson threatened to break off relations with Germany. What did Germany do in response?

On February 1, 1917 Germany announced it would sink any ship in the waters around Britain without warning, neutral ships included. What did the United States do within days?

British intelligence decoded a German cable offering Mexico the recovery of Texas, New Mexico and Arizona if it joined Germany against the United States, and American papers printed it on March 1, 1917. What did publication do?

Mexico accepted Germany's offer in the Zimmermann telegram and declared war on the United States.

Asking Congress for a declaration of war on April 2, 1917, Wilson said the world 'must be made safe for democracy.' How was he defining the war he wanted?

The Senate voted 82 to 6 for the war resolution on April 4, 1917 and the House voted 373 to 50 on April 6. What do those margins show?

Jeannette Rankin of Montana, the first woman elected to Congress, took part in the House vote on the war resolution on April 6, 1917. What did she do?