On June 28, the Treaty of Versailles was signed, which ordered Germany to reduce its military, take responsibility for the World War I, relinquish some of its territory and pay exorbitant reparations to the Allies. It also prevented Germany from joining the League of Nations at that time.

In October 1918, the constitution of the German Empire was reformed to give more powers to the elected parliament.

By 7 November, the revolution had reached Munich, resulting in King Ludwig III of Bavaria fleeing. The MSPD decided to make use of their support at the grassroots and put themselves at the front of the movement, demanding that Kaiser Wilhelm II abdicate.

On 9 November 1918, the "German Republic" was proclaimed by MSPD member Philipp Scheidemann at the Reichstag building in Berlin, to the fury of Friedrich Ebert, the leader of the MSPD, who thought that the question of monarchy or republic should be answered by a national assembly.

Hostilities in World War I took place between 28 July 1914 and 11 November 1918, during which over 70 million military personnel were mobilised; the war ended with 20 million military and civilian deaths —exclusive of fatalities from the 1918 Spanish flu pandemic, which accounted for millions more—making it one of the largest and deadliest wars in history. The position of Germany and the Central Powers deteriorated, leading them to sue for peace.

On 11 November 1918, an armistice was signed at Compiègne by German representatives. It effectively ended military operations between the Allies and Germany. It amounted to German capitulation, without any concessions by the Allies; the naval blockade would continue until complete peace terms were agreed upon.

From November 1918 to January 1919, Germany was governed by the "Council of the People's Deputies", under the leadership of Ebert and Haase.

The occupation of the Rhineland took place following the Armistice with Germany of 11 November 1918. The occupying armies consisted of American, Belgian, British and French forces.

In January, the Spartacus League and others in the streets of Berlin made more armed attempts to establish communism, known as the Spartacist uprising.

On February 6, 1919, the National Assembly met in the town of Weimar and formed the Weimar Coalition. They also elected SDP leader Friedrich Ebert as President of the Weimar Republic.

On 13 March 1920 during the Kapp Putsch, 12,000 Freikorps soldiers occupied Berlin and installed Wolfgang Kapp, a right-wing journalist, as chancellor.

The Treaty of Rapallo was an agreement signed on 16 April 1922 between the German Republic and Soviet Russia under which both renounced all territorial and financial claims against each other and opened friendly diplomatic relations.

By 1923, the Republic claimed it could no longer afford the reparations payments required by the Versailles Treaty, and the government defaulted on some payments.

French and Belgian troops occupied the Ruhr region, Germany's most productive industrial region at the time, taking control of most mining and manufacturing companies in January 1923.

Gustav Stresemann was Reichskanzler for 100 days in 1923, and served as foreign minister from 1923 to 1929, a period of relative stability for the Weimar Republic, known in Germany as Goldene Zwanziger ("Golden Twenties").

In October 1925 the Treaty of Locarno was signed by Germany, France, Belgium, Britain and Italy; it recognised Germany's borders with France and Belgium.

In 1926, Germany was admitted to the League of Nations as a permanent member, improving her international standing and giving the right to vote on League matters.

In 1926, about 2 million Germans were unemployed, which rose to around 6 million in 1932. Many blamed the Weimar Republic. That was made apparent when political parties on both right and left wanting to disband the Republic altogether made any democratic majority in Parliament impossible.

The general elections on 31 July 1932 yielded major gains for the Communists, and for the Nazis, who won 37.3% of the vote—their high-water mark in a free election. The Nazi party then supplanted the Social Democrats as the largest party in the Reichstag, although it did not gain a majority.

Hitler was sworn in as Chancellor on the morning of 30 January 1933.

Enabling Act, law passed by the German Reichstag (Diet) in 1933 that enabled Adolf Hitler to assume dictatorial powers.

The Von Schleicher Cabinet de jure formed the government of Weimar Germany between 3 December 1932 and 28 January 1933 upon the resignation of Franz von Papen