4657 events
Causes of World War I: Archduke Franz Ferdinand of Austria and his wife Sophie are assassinated in Sarajevo, beginning t
The funeral of Archduke Franz Ferdinand and his wife Sophie takes place in Vienna, six days after their assassinations…
The US Navy launches the USS Nevada (BB-36) as its first standard-type battleship.
The U.S. Congress forms the Aviation Section, U.S. Signal Corps, giving official status to aircraft within the U.S.…
The U.S. Congress forms the Aviation Section, U.S. Signal Corps, giving official status to aircraft within the U.S.…
July Crisis: Austria-Hungary issues a series of demands in an ultimatum to the Kingdom of Serbia demanding Serbia to…
World War I: In the culmination of the July Crisis, Austria-Hungary declares war on the Kingdom of Serbia and begins…
World War I: The German Empire declares war on the Russian Empire.
World War I: The Swiss Army mobilizes because of World War I.
World War I: The German occupation of Luxembourg begins.
World War I: Germany declares war against France, while Romania declares its neutrality.
World War I: In response to the German invasion of Belgium, Belgium and the British Empire declare war on Germany. The…
World War I: The German minelayer SS Königin Luise lays a minefield about 40 miles (64 km) off the Thames Estuary…
World War I: The guns of Point Nepean fort at Port Phillip Heads in Victoria (Australia) fire across the bows of the…
World War I: U-boat campaign: Two days after the United Kingdom had declared war on Germany over the German invasion…
World War I: Serbia declares war on Germany; Austria declares war on Russia.
World War I: France, the United Kingdom and the British Empire declare war on Austria-Hungary.
World War I: The Battle of Halen a.k.a. Battle of the Silver Helmets a clash between large Belgian and German cavalry…
World War I: Start of the Battle of Lorraine, an unsuccessful French offensive.
World War I: The First Russian Army, led by Paul von Rennenkampf, enters East Prussia.