Austrian Ultimatum: The Spark That Ignites World War I
Austria-Hungary delivered a ten-point ultimatum to Serbia on July 23, 1914, deliberately drafted to be unacceptable. Serbia agreed to nine of the ten demands but rejected the one requiring Austrian police to operate within Serbian borders, calling it a violation of sovereignty. Austria severed diplomatic relations immediately. The ultimatum was the critical step in a chain reaction that turned the assassination of Archduke Franz Ferdinand into a continental war. Russia mobilized to defend Serbia; Germany backed Austria and declared war on Russia; France honored its alliance with Russia; Germany invaded Belgium to reach France; Britain declared war to defend Belgian neutrality. Within two weeks, all of Europe was at war.
July 23, 1914
112 years ago
Key Figures & Places
What Else Happened on July 23
Byzantine emperor Nikephoros I sacks Pliska, seizing Khan Krum's treasury in a brutal raid that temporarily crushes Bulgarian resistance. This victory, however,…
Knights Hospitaller galleys decimated an Aydinid fleet off the coast of Chios, shattering Turkish naval dominance in the Aegean. This decisive engagement secure…
Three hundred colonists set sail from Dieppe, France, bound for the rugged shores of New France. This expedition reinforced French territorial claims in North A…
Danish-Norwegian forces seized the strategic harbor town of Marstrand from Sweden, severing the Swedish navy’s primary connection to the North Sea. This capture…
Prussian forces reclaimed Mainz from French radical troops, dismantling the short-lived Republic of Mainz. This victory restored the authority of the Elector of…
Sir Thomas Maitland seized control of Malta on July 23, 1813, instantly converting the island from a fragile British protectorate into a fully administered colo…
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