Gustav Holst's orchestral suite The Planets receives its private premiere in London, conducted by Adrian Boult before an invited audience.

Mathematician Emmy Noether's landmark paper proving the deep link between symmetries and conservation laws in physics was presented to the Göttingen Academy.

In Prague, the National Committee proclaimed the independent state of Czechoslovakia, ending centuries of Habsburg rule as the Austro-Hungarian Empire collapsed.

Slovak leaders in Turčiansky Svätý Martin issued the Martin Declaration, joining with Czech lands to found the new state of Czechoslovakia as Austria-Hungary collapsed.

At 11 a.m., guns fell silent across the Western Front as the Armistice between the Allies and Germany took effect, ending four years of industrialized slaughter.

Józef Piłsudski assumed military command in Warsaw as Poland declared independence, resurrecting a state erased from the map for 123 years.

Latvia proclaimed its independence from Russian and German rule in Riga, forming the People's Council and establishing a provisional government under Kārlis Ulmanis.

In the chaotic weeks after Austria-Hungary's collapse, Slovak and Hungarian forces clashed over borders as the new Czechoslovak state asserted control over contested territory.