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Archduke assasinated, war declared
Archduke Franz Ferdinand of Austria and his wife Sophie are shot to death by a Bosnian Serb nationalist during an official visit to the Bosnian capital of Sarajevo. The killings sparked a chain of events that led to the outbreak of World War I by early August -
Australia
declares war on Serbia -
Australia-Hungary
repeatedly invades Serbia but is repeatedly repulsed -
Outbreak war
Germany declares war on Russia -
germany
declares war on france -
Woodrow Wilson
US President Woodrow Wilson declares policy of US neutrality -
Battle of the Frontiers
begins -
Period: to
Russia
invades East Prussia -
Period: to
Battle of Marne
First Battle of Marne, halts German advance, resulting in stalemate and trench warfare -
Austro-German
Austro-German attack on western Poland -
Period: to
Battle of Ypres
First Battle of Ypres -
German
First German air raid on Britain -
Unofficial Christmas
Unofficial Christmas truce declared by soldiers along the Western Front