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Assassination of Archduke Ferdinand
On June 28, 1914, a teenage Serbian nationalist gunned down Archduke Franz Ferdinand and his wife, Sophie, as their motorcade maneuvered through the streets of Sarajevo. Next in line for the Austro-Hungarian throne, Ferdinand had not been particularly well liked in aristocratic circles -
Schlieffen Plan
The Schlieffen Plan was the operational plan for a designated attack on France once Russia, in response to international tension, had started to mobilise her forces near the German border. The execution of the Schlieffen Plan led to Britain declaring war on Germany on August 4th, 1914. -
Trench warfare began
Trench warfare of the First World War can be said to have begun in September 1914 and ended when the Allies made a breakthrough attack that began in late July 1918. Before and after those dates were wars of movement: in between it was a war of entrenchment. -
Christmas Truce along Western Front
During World War I, on and around Christmas Day 1914, the sounds of rifles firing and shells exploding faded in a number of places along the Western Front in favor of holiday celebrations in the trenches and gestures of goodwill between enemies. -
Germans introduce poison gas
On April 22, 1915, German forces shock Allied soldiers along the western front by firing more than 150 tons of lethal chlorine gas against two French colonial divisions at Ypres, Belgium. This was the first major gas attack by the Germans, and it devastated the Allied line. -
Sinking of Lusitania
The British Admiralty had secretly subsidized her construction and she was built to Admiralty specifications with the understanding that at the outbreak of war the ship would be consigned to government service. As war clouds gathered in 1913, the Lusitania quietly entered dry dock in Liverpool and was fitted for war service. -
Battle of Verdun
This World War I siege stemmed from German General Erich von Falkenhayn’s edict to elicit major bloodshed from the French defense of the fortress complex around Verdun. German forces advanced quickly in February 1916, claiming Fort Douaumont and Fort Vaux after brutal subterranean melees. Despite coming within two miles of Verdun cathedral, the Germans called off their offensive in mid-July, and Falkenhayn was relieved of his position. -
Sussex Pledge
The Sussex Pledge was a promise made in 1916 during World War I by Germany to the United States prior to the latter's entry into the war. Early in 1915, Germany had instituted a policy of unrestricted submarine warfare, allowing armed merchant ships, but not passenger ships, to be torpedoed without warning. -
General John J. Pershing became AEF leader
U.S. Army general John J. Pershing (1860-1948) commanded the American Expeditionary Force (AEF) in Europe during World War I. The president and first captain of the West Point class of 1886, he served in the Spanish- and Philippine-American Wars and was tasked to lead a punitive raid against the Mexican revolutionary Pancho Villa. In 1917, President Woodrow Wilson selected Pershing to command the American troops being sent to Europe. Although Pershing aimed to maintain the independence of the AE -
Zimmerman Telegram
On this day in 1917, the text of the so-called Zimmermann Telegram, a message from the German foreign secretary, Arthur Zimmermann, to the German ambassador to Mexico proposing a Mexican-German alliance in the case of war between the United States and Germany, is published on the front pages of newspapers across America. -
President Woodrow Wilson asked for declaration of war
On this day in 1917, President Woodrow Wilson asks Congress to send U.S. troops into battle against Germany in World War I. In his address to Congress that day, Wilson lamented it is a fearful thing to lead this great peaceful people into war. Four days later, Congress obliged and declared war on Germany. -
Committee on Public Information formed
The Committee on Public Information (CPI), was established on April 13, 1917 and headed by George Creel. The CPI provided propaganda during WW1 to rally the support of American citizens for all aspects of the war effort. President Woodrow Wilson considered that public support was to the entire wartime effort. -
Selective Service Act became law
When he went before Congress on April 2, 1917, to deliver his war message, President Woodrow Wilson had pledged all of his nation’s considerable material resources to help the Allies—France, Britain, Russia and Italy—defeat the Central Powers. What the Allies desperately needed, however, were fresh troops to relieve their exhausted men on the battlefields of the Western Front, and these the U.S. was not immediately able to provide. -
Battle of Argonne Forest
The Meuse-Argonne Offensive, also known as the Maas-Argonne Offensive and the Battle of the Argonne Forest, was a major part of the final Allied offensive of World War I that stretched along the entire Western Front. It was fought from September 26, 1918, until the Armistice of 11 November 1918, a total of 47 days. -
World War I ended
At the 11th hour on the 11th day of the 11th month of 1918, the Great War ends. At 5 a.m. that morning, Germany, bereft of manpower and supplies and faced with imminent invasion, signed an armistice agreement with the Allies in a railroad car outside Compiégne, France. The First World War left nine million soldiers dead and 21 million wounded, with Germany, Russia, Austria-Hungary, France, and Great Britain each losing nearly a million or more lives. In addition, at least five million civilians
