The chancellor of Germany during the final months of the war. As Kaiser Wilhelm II lost control of the country, Prince Max temporarily assumed leadership and played a major role in arranging the armistice.
The first lord of the British admiralty. Although Churchill is better known for his role as Britain’s prime minister during World War II, he played a significant role in World War I as well, serving as the head of Britain’s navy until he was demoted in 1915 following the British failure at the Dardanelles. Shortly thereafter, Churchill resigned his post and went to serve on the western front as a battalion commander.
The king of Greece for much of the war. Although Greece remained neutral during his reign, Constantine himself had strongly pro-German sentiments, at the same time that his government favored the Allies. He abdicated on June 12, 1917, under pressure of a threatened Allied invasion. Less than one month later, Greece entered the war on the side of the Allied forces.
A British admiral in command of the Fourth Squadron. Cradock is known primarily for his catastrophic defeat at the Battle of Coronel on November 1, 1914, in which he lost his life.
The archduke of Austria, nephew of Emperor Franz Joseph, and heir to the Habsburg throne. Franz Ferdinand’s assassination on June 28, 1914, by Serbian militant Gavrilo Princip, is widely considered the unofficial start of World War I.
The emperor of Austria-Hungary until his death in late 1916.
A German general credited with a major victory over Russia at the Battle of Tannenberg in August 1914. One month later, Hindenburg was promoted to commander in chief of the German land armies, the position in which he served until the end of the war.
A German general who assisted Paul von Hindenburg in achieving victories at the Battle of Tannenberg and the Battle of the Masurian Lakes. Throughout the rest of the war, Ludendorff continued to serve Hindenburg, first as chief of staff and later as quartermaster general.
The Russian tsar who committed Russia to the defense of Serbia when Serbia was attacked by Austria. Nicholas II committed to this course only with hesitation and under great pressure from his military advisers. He abdicated in March 1917 after the “February” Revolution and was eventually murdered, along with his wife and children, by the Bolsheviks in July 1918.
The American general in command of all U.S. forces in Europe during the war. To the Allies’ consternation, Pershing strongly opposed the idea of sending American forces to fight on the front alongside regiments from Britain and France. Nevertheless, he did eventually reach a compromise, allowing limited numbers of U.S. soldiers to do exactly that.
A teenage Serbian militant who assassinated Austrian Archduke Franz Ferdinand on June 28, 1914. Princip was armed and trained by a Serbian terrorist group known as the Black Hand. His assassination of Ferdinand is widely considered to be the opening shot of World War I. Princip spent the war in prison, where he died of tuberculosis in 1918.
The German general in command of the Eighth Army at the opening of the war. In August 1914, in the first battle Prittwitz fought following Russia’s initial invasion of Germany, he was defeated, panicked, and retreated. He was promptly replaced by Generals Hindenburg and Ludendorff.
The Serbian chief of general staff, known primarily for leading a successful defense of Serbia during the beginning of the war. In August 1914, Putnik’s forces ambushed the Austro-Hungarian army in the Jadar Valley and pushed them out of Serbia.
The general in command of the Russian First Army. Following his defeat in the Battle of the Masurian Lakes in September 1914, Rennenkampf was dismissed from the army on grounds of incompetence.
The general in command of the Russian Second Army, which suffered a catastrophic defeat at the Battle of Tannenberg on August 29, 1914. Samsonov committed suicide that same day.
The admiral in command of the Mediterranean Squadron of the German navy. Souchon led the attack on Russia’s Black Sea ports in October 1914, which brought the Ottoman Empire into the war.
The German admiral in command of the famous East Asia Squadron. Spee is famous for his victory in the Battle of Coronel against the British admiral Sir Christopher Cradock on November 1, 1914. Just over a month later, Spee died in the Battle of the Falkland Islands, in which the East Asia Squadron was defeated.
An admiral and first secretary of the German navy. Tirpitz was largely responsible for the buildup of the German navy prior to the war, as well as for the country’s aggressive submarine strategy. Although the policy was highly effective, it damaged Germany’s international reputation, leading to Tirpitz’s resignation in 1916.
British general in command of the Sixth Indian Division. Townshend is known for leading the British campaign in Mesopotamia from 1915 to 1916. On April 29, 1916, he surrendered all 10,000 of his men at Kut, Mesopotamia—the largest military surrender in British history.
The German kaiser (emperor) during the war. Wilhelm II was a cousin of Nicholas II of Russia and George V of Britain; all were grandsons of Queen Victoria of England.
The president of the United States for the entire period of the war. During the first half of the war, Wilson, a Democrat, maintained a strictly neutral position and tried to serve as an active intermediary between the two sides. American neutrality remained a major theme during his 1916 reelection campaign. However, Wilson was soon forced to change his position when Germany began unrestricted submarine warfare and the American public was scandalized by the infamous Zimmermann telegram in 1917.
The German foreign minister responsible for the 1917 Zimmermann telegram, which attempted to coerce Mexico into attacking the United States in exchange for financial incentives and a military alliance between Mexico and Germany. The exposure of Zimmermann’s communiqué was a major factor provoking the United States into declaring war on Germany.
An alliance during World War I that originally consisted of Russia, France, and Britain. Many other countries, including Belgium, Canada, Greece, Italy, Japan, and Romania, joined later as associate powers. Although the United States never joined the Allied Powers—preferring on principle to fight the Central Powers independently—it cooperated closely with the Allied Powers once it joined the war in 1917.
An ultimatum that Austria issued to Serbia on July 23, 1914, escalating tensions between the two nations. The ultimatum demanded that Serbia crack down on anti-Austrian propaganda in the Serbian press and that Serbia allow Austria to participate directly in judicial proceedings to prosecute the parties guilty of assassinating Archduke Franz Ferdinand.
A battle on August 28, 1914, in which the British Royal Navy baited German warships in Helgoland Bight out to sea, where British forces sank three of the German ships with few losses of their own.
A November 1, 1914, engagement in which the German East Asia Squadron defeated a weaker British squadron off the coast of Argentina.
A battle on December 8, 1914, in which the British decimated the German East Asia Squadron during an attack on the Falkland Islands in the South Atlantic.
A lengthy campaign, lasting from April 25, 1915, to January 6, 1916, in which Britain invaded Turkey’s Gallipoli Peninsula as part of its effort to force open the Dardanelles, the strait between Europe and Asia. The operation failed and cost hundreds of thousands of lives before the British abandoned the operation and evacuated their forces at the start of 1916.
A battle on September 5–9, 1914, in which Allied forces, following their retreat from Mons, stopped German forces on the banks of the Marne River and forced them back forty-five miles to the river Aisne.
An engagement on September 9–14, 1914, in which two German armies under the command of General Paul von Hindenburg defeated Russia’s First Army under General Paul von Rennenkampf. Russia suffered 125,000 casualties.
An intensive June 7, 1917, assault by the British on German forces in northern France. The British began preparations six months in advance, digging nineteen tunnels under a ridge where the Germans were entrenched and then filling the tunnels with explosives. The operation was a success and forced the Germans to retreat.
A battle on August 23, 1914, that was one of the earliest battles on the western front. The German advance in Belgium overwhelmed British and French forces, who began a fourteen-day retreat to the outskirts of Paris.
An engagement lasting from September 20 to October 12, 1917, in which British forces in Belgium continued to push the Germans back. The fighting was especially miserable because it was carried out during a period of heavy rains.
One of the largest battles of the war, fought in northern France from July 1 to November 18, 1916, simultaneously with the Battle of Verdun. The Battle of the Somme was the result of an Allied offensive along a twenty-five-mile front. Although it ended up as a small victory for the Allied Powers, it cost them 146,000 lives in order to advance less than six miles.
A battle in Prussia (present-day Poland) on August 26–30, 1914, in which two German armies under command of General Paul von Hindenburg engaged Russia’s Second Army under General Alexander Samsonov. It was a catastrophic defeat for Russia, which suffered over 120,000 casualties.
The longest and one of the deadliest battles of the war, lasting from February 21 to December 18, 1916. Germany, hoping to wear France down and inflict large numbers of casualties, assaulted the fortified town of Verdun, which blocked the German forces’ path to Paris. The battle ended without a clear victor, despite the deaths of more than 650,000 soldiers.
A terrorist Serbian nationalist group that was responsible for training and arming Gavrilo Princip and others who participated in the assassination of Archduke Franz Ferdinand.
Kaiser Wilhelm II of Germany’s unconditional promise to defend Austria-Hungary if Russia attacked it while Austria was invading Serbia. The guarantee was made on July 5, 1914, a week after Archduke Ferdinand’s assassination.
Technically, the term for the total number of people who are killed, wounded, or captured in a battle. Use of this word varies, but historians generally follow this convention.
An alliance during World War I that originally consisted of Germany and Austria-Hungary. Other nations, including Bulgaria and the Ottoman Empire, joined later.
A German military plan, formulated in 1905, that addressed how Germany should handle the threat of a war on two fronts with Russia and France. In short, the plan stipulated that if war were expected, Germany should first attack France before embarking upon military actions against Russia. The rationale for this approach was that Russia would require several weeks in order to mobilize its troops and assemble them along the German border. Under the plan, Germany hoped to overrun France in only six weeks by attacking across France’s borders with Belgium and Holland, which were less fortified than the border with Germany.
A prewar alliance among Germany, Austria-Hungary, and Italy, formalized in 1882. At the start of World War I, Italy dropped out of this alliance, initially maintaining a neutral position in regard to the war.
A vaguely defined prewar alliance among Russia, France, and Britain, finalized in 1907. The Triple Entente was not a formal treaty and had little real substance.
A war in which victory is determined purely by which side is better able to endure numerous, prolonged casualties (as opposed to a war in which victory is determined by accomplishing a specific objective, such as capturing a major city).
A January 1917 telegram sent by German foreign minister Alfred Zimmermann to the German ambassador to Mexico, discussing a secret plan to bait Mexico into attacking the United States. Under the plan, Germany intended to offer Mexico financial incentives to attack the United States, as well as military support to help Mexico retake its former territories of Texas, New Mexico, and Arizona. British intelligence intercepted the telegram, which was eventually published in the American press, sparking an uproar that shifted American public opinion in favor of entering the war.
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