Schlieffen Plan in the context of "Generaloberst"

World War I, or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a global conflict between two coalitions: the Allies (or Entente) and the Central Powers. Major areas of conflict included Europe and the Middle East, as well as parts of Africa and the Asia-Pacific. The war saw important developments in weaponry including tanks, aircraft, artillery, machine guns, and chemical weapons. One of the deadliest conflicts in history, it resulted in an estimated 30 million military casualties, and 8 million civilian deaths from war-related causes and genocide. The movement of large numbers of people was a major factor in the deadly Spanish flu pandemic.

The causes of World War I included the rise of the German Empire and decline of the Ottoman Empire, which disturbed the long-standing balance of power in Europe, the exacerbation of imperial rivalries, and an arms race between the great powers. Growing tensions in the Balkans reached a breaking point on 28 June 1914 when Gavrilo Princip, a Bosnian Serb, assassinated Franz Ferdinand, the heir to the Austro-Hungarian throne. Austria-Hungary blamed Serbia, and declared war on 28 July. After Russia mobilised in Serbia's defence, Germany declared war on Russia and France, who had an alliance. The United Kingdom entered the war after Germany invaded Belgium, and the Ottoman Empire joined the Central Powers in November. Germany's strategy in 1914 was to quickly defeat France before transferring its forces to the east, but its advance was halted in September, and by the end of the year the Western Front consisted of a near-continuous line of trenches from the English Channel to Switzerland. The Eastern Front was more dynamic, but neither side gained a decisive advantage, despite costly offensives. Italy, Bulgaria, Romania, Greece and others entered the war from 1915 onward.

The Ulm campaign was a series of French and Bavarian military maneuvers and battles to outflank and capture an Austrian army in 1805 during the War of the Third Coalition. It took place in the vicinity of and inside the Swabian city of Ulm. The French Grande Armée, led by Emperor Napoleon, had 210,000 troops organized into seven corps and hoped to knock out the Austrian army in the Danube before Russian reinforcements could arrive. Rapid marching let Napoleon conduct a large wheeling maneuver, which captured an Austrian army of 60,000 under Feldmarschall-Leutnant (FML) Karl Freiherr Mack von Leiberich on 20 October at Ulm. The campaign is by some military historians regarded as a strategic masterpiece and was influential in the development of the Schlieffen Plan in the late 19th century. Napoleon himself wrote:

The victory at Ulm did not end the war since a large Russian army under Mikhail Kutuzov was near Vienna to defend the city against the French. The Russians withdrew to the northeast to await reinforcements and to link up with Austrian army units. The French moved aggressively forward and captured Vienna on 12 November. On 2 December, the massive Battle of Austerlitz, causing 24,000 to 36,000 casualties, removed Austria from the war. The resulting Treaty of Pressburg in late December brought the Third Coalition to an end and established Napoleonic France as the major power in Central Europe, which led to the War of the Fourth Coalition against the Kingdom of Prussia and Russia the following year.

Georges Benjamin Clemenceau (28 September 1841 – 24 November 1929) was a French statesman who was prime minister of France from 1906 to 1909 and again from 1917 until 1920. A physician turned journalist, he played a central role in the politics of the Third Republic, particularly amid the end of the First World War. He was a key figure of the Independent Radicals, advocating for the separation of church and state, as well as the amnesty of the Communards exiled to New Caledonia.

After about 1,400,000 French soldiers were killed between the German invasion and Armistice, he demanded a total victory over the German Empire. Clemenceau stood for reparations, a transfer of colonies, strict rules to prevent a rearming process, as well as the restitution of Alsace–Lorraine, which had been annexed to Germany in 1871. He achieved these goals through the Treaty of Versailles signed at the Paris Peace Conference (1919–1920). Nicknamed Père la Victoire ("Father Victory") or Le Tigre ("The Tiger"), he continued his harsh position against Germany in the 1920s, although not quite so much as President Raymond Poincaré or former Supreme Allied Commander Ferdinand Foch, who thought the treaty was too lenient on Germany, prophetically stating: "This is not peace. It is an armistice for twenty years." Clemenceau obtained mutual defence treaties with the United Kingdom and the United States, to unite against possible future German aggression, but these never took effect due to the U.S. Senate's failure to ratify the treaty, which thus also nullified British obligation.

Erich Friedrich Wilhelm Ludendorff (German: [ˈeːʁɪç ˈfʁiːdʁɪç ˈvɪlhɛlm ˈluːdn̩dɔʁf] ; 9 April 1865 – 20 December 1937) was a Prussian-born German general and politician. He achieved fame during World War I (1914–1918) for his central role in the German victories at Liège and Tannenberg in 1914. After his appointment as First Quartermaster General of the German General Staff in 1916, Ludendorff became Germany's chief policymaker in a de facto military dictatorship until the country's defeat in 1918. Later during the years of the Weimar Republic, he took part in the failed 1920 Kapp Putsch and Adolf Hitler's 1923 Beer Hall Putsch, thereby contributing significantly to the Nazis' rise to power.

Erich Ludendorff came from a non-noble family in Kruszewnia in the Prussian Province of Posen. Upon completing his education as a cadet, he was commissioned a junior officer in 1885. In 1893, he was admitted to the prestigious German War Academy, and only a year later was recommended by its commandant to the General Staff Corps. By 1904, he had rapidly risen in rank to become a member of the Army's Great General Staff, where he oversaw the development of the Schlieffen Plan.

The Rape of Belgium (French: Viol de la Belgique, lit. 'Violation of Belgium', Dutch: Verkrachting van België) was a series of systematic war crimes, especially mass murder and deportation, by German troops against Belgian civilians during the invasion and occupation of Belgium during World War I. The neutrality of Belgium had been guaranteed by the Treaty of London of 1839, which had been signed by the German Confederation (of which Prussia was a member). However, the German Schlieffen Plan required that German armed forces advance through Belgium (thus violating its neutrality) in order to outflank the French Army, concentrated in eastern France. The German Chancellor, Theobald von Bethmann Hollweg, dismissed the treaty of 1839 as a "scrap of paper".

Throughout the war, the German army systematically engaged in numerous atrocities against the civilian population of Belgium, including the intentional destruction of civilian property; German soldiers murdered over 6,000 Belgian civilians, and 17,700 died during expulsions, deportations, imprisonment, or death sentences by court. The Wire of Death, a lethal electric fence maintained by the Imperial German Army to hinder civilians from fleeing the occupation to the Netherlands, resulted in the deaths of over 3,000 Belgian civilians. Some 120,000 were forced to work and deported to Germany. German forces destroyed 25,000 homes and other buildings in 837 communities in 1914 alone, and 1.5 million Belgians (20% of the entire population) fled from the invading German army.

The cult of the offensive refers to a strategic military dilemma in which leaders believe that offensive advantages are so great that a defending force would have no hope of repelling the attack and therefore choose to attack. It is most often used to explain the causes of World War I and the subsequent heavy losses that occurred year after year, on all sides, during the fighting on the Western Front.

The term has also been applied to pre-World War II air power doctrine that held that "the bomber will always get through" and the only way to end a bombing campaign was to bomb the enemy into submission.

Graf Alfred von Schlieffen (German pronunciation: [ɡʁaːf ˈalfʁeːt fɔn ˈʃliːfn̩]; 28 February 1833 – 4 January 1913) was a German and Prussian officer and strategist, eventually reaching the rank of field marshal. He served as chief of the Imperial German General Staff from 1891 to 1906. His name is most known for the 1905–06 "Schlieffen Plan", then Aufmarsch I, a deployment plan and operational guide for a decisive initial offensive operation/campaign in a two-front war against the French Third Republic and the Russian Empire.