-
Allies
In World War I, the group of nations—originally
consisting of Great Britain, France, and Russia and later joined
by the United States, Italy, and others—that opposed the Central
Powers. -
Central Powers
the group of nations—led by Germany, Austria-Hungary, and the Ottoman Empire—that opposed the Allies in World War I. -
1914 Assassination of Archduke Franz Ferdinand
In June 1914, Archduke Franz Ferdinand, heir to the Austrian throne, visited the Bosnian capital Sarajevo. As the royal entourage drove through the city, Serbian nationalist Gavrilo Princip stepped from the crowd and shot the Archduke and his wife Sophie. Princip was a member of the Black Hand, an organization promoting Serbian nationalism. The assassinations touched off a diplomatic crisis. On July 28, Austria-Hungary declared what was expected to be a short war against Serbia. -
Schlieffen Plan
On August 3, 1914, Germany invaded Belgium, following
a strategy known as the Schlieffen Plan. This plan called
for a holding action against Russia, combined with a quick
drive through Belgium to Paris; after France had fallen, the
two German armies would defeat Russia. As German troops swept across Belgium, thousands of civilians fled in terror. In Brussels, the Belgian capital, an American war correspondent described the first major refugee crisis of the 20th century. -
Sinking of British liner Lusitania
One of the worst disasters occurred on May 7, 1915, when a U-boat sank the British liner Lusitania off the southern coast of Ireland. Of the 1,198 persons lost, 128 were Americans. The Germans defended their action on the grounds that the liner carried ammunition. Despite Germany’s explanation, Americans became outraged with Germany because of the loss of life. American public opinion turned against Germany and the Central Powers. -
Sinking of British Arabic
Despite this provocation, President Wilson ruled out a military response in favor of a sharp protest to Germany. Three months later, in August 1915, a U-boat sank another British liner, the Arabic, drowning two Americans. Again the United States protested, and this time Germany agreed not to sink any more passenger ships. -
Sinking of French passenger liner Sussex
In March 1916 Germany broke its promise and torpedoed an unarmed French passenger steamer, the Sussex. The Sussex sank, and about 80 passengers, including Americans, were killed or injured. Once again the United States warned that it would break off diplomatic relations unless Germany changed its tactics. Again Germany agreed, but there was a condition: if the United States could not persuade Britain to lift its blockade against food and fertilizers, Germany would consider renewing unrestricted -
Battle of the Somme
The scale of slaughter was horrific. During the First Battle of the Somme— which began on July 1, 1916, and lasted until mid-November—the British suffered 60,000 casualties the first day alone. Final casualties totaled about 1.2 million, yet only about seven miles of ground changed hands. This bloody trench warfare, in which armies fought for mere yards of ground, continued for over three years. Elsewhere, the fighting was just as devastating and inconclusive. -
Zimmermann note
a message sent in 1917 by the German foreign minister to the German ambassador in Mexico, proposing a German-Mexican alliance and promising to help Mexico regain Texas, New Mexico, and Arizona if the United States entered World War I. -
Committee on Public Information
To popularize the war, the government set up the nation’s first propaganda agency, the Committee on Public Information (CPI). Propaganda is a kind of biased communication designed to influence people’s thoughts and actions. The head of the CPI was a former muckraking journalist named George Creel. -
Selective Service Act of 1917
To meet the government’s need for more fighting power, Congress passed the Selective Service Act in May 1917. The act required men to register with the government in order to be randomly selected for military service. By the end of 1918, 24 million men had registered under the act. Of this number, almost 3 million were called up. About 2 million troops reached Europe before the truce was signed, and three-fourths of them saw actual combat. Most of the inductees had not attended high school. -
Convoy System
the protection of merchant ships from U-boat—German submrine—attacks by having the ships travel in large groups escorted by warships.
German U-boat attacks on merchant ships in the Atlantic were a serious threat to the Allied war effort. American Vice Admiral William S. Sims convinced theBritish to try the convoy system, in which a heavy guard of destroyers escorted merchant ships back and forth across the Atlantic in groups. By fall of 1917, shipping losses had been cut in half. -
War Industries Board
an agency established during World War I to increase efficiency and discourage waste in warrelated industries. -
National War Labor Board
To deal with disputes between management and labor, President Wilson established the National War Labor Board in 1918. Workers who refused to obey board decisions could lose their draft exemptions. “Work or fight,” the board told them. However, the board also worked to improve factory conditions. It pushed for an eight-hour workday, promoted safety inspections, and enforced the child labor ban. -
Espionage and Sedition Acts
In June 1917 Congress passed the Espionage Act, and in May 1918 it passed the Sedition Act. Under the Espionage and Sedition Acts a person could be fined up to $10,000 and sentenced to 20 years in jail for interfering with the war effort or for saying anything disloyal, profane, or abusive about the government or the war effort. -
Second Battle of the Marne
U.S. troops played a major role in throwing back German attacks at Château-Thierry and Belleau Wood. In July and August, they helped win the Second Battle of the Marne. The tide had turned against the Central Powers. In September, U.S. soldiers began to mount offensives against the Germans at Saint-Mihiel and in the Meuse-Argonne area. -
Austria-Hungary surrenders to the Allies
On November 3, 1918, AustriaHungary surrendered to the Allies. That same day, German sailors mutinied against government authority. The mutiny spread quickly. Everywhere in Germany, groups of soldiers and workers organized revolutionary councils. -
Establishment of the German Republic
On November 9, socialist leaders in the capital, Berlin, established a German republic. The kaiser gave up the throne. Although there were no Allied soldiers on German territory and no truly decisive battle had been fought, the Germans were too exhausted to continue fighting. -
Cease-fire and armistice
at the eleventh hour, on the eleventh day, in the eleventh month
of 1918, Germany agreed to a cease-fire and signed the armistice, or truce,
that ended the war. -
Food Administration
To help produce and conserve food, Wilson set up the Food Administration under Herbert Hoover. Instead of rationing food, he called on people to follow the “gospel of the clean plate.” He declared one day a week “meatless,” another “sweetless,” two days “wheatless,” and two other days “porkless.” Restaurants removed sugar bowls from the table and served bread only after the first course.
