28th June
Austro-Hungarian crown prince Archduke Franz Ferdinand and his wife Sophia Hohenberg Chotek were assassinated in Sarajevo.

23rd July
Austria-Hungary issues an ultimatum to the Kingdom of Serbia.

25th July
Beginning of mobilization in Austria-Hungary for men fit for army duty between 21 and 42 years old.

28th July
Austria-Hungary declared war on Serbia. World War began.

2nd August
Germany occupied Luxemburg and continued its advance across Belgium towards France.

31st August
On the Eastern Front Russian troops were defeated near Tannenberg.

6th September
The Battle of Marna forced the Germans to retreat. Verdun became one of the main points of the Western Front.

21st to 24th December
The trial in which 32 members of the Renewal (Preporod) society accused of high treason were given various sentences.