Austria-Hungary declares war on Serbia. Partial mobilization (training of troops) of the Russian army against Austria-Hungary occurs
Full mobilization of the Russian army against Austria-Hungary occurs. Germany warns Russia to halt the mobilization. Russia ignores Germany.
Germany declares war on Russia
Germany declares war on France. Germany demands the right to pass through Belgium but Belgium is neutral.
Britian declares war on Germany for violating the Belgian neutrality
The Allies (Russia, Britain and France) declare war on the Ottoman Empire (The Ottoman Empire had joined the Central powers) (Day unknown)
Planes are used in war for the first time (month and day unknown)
Italians turn on Germany and Austria by attacking Austria (Day unknown)
The British ship Lusitania is sunk by the German blockade
Bulgaria joins Germany and Austria and together, they defeat Serbia (Day unknown)
There is a growing opposition within the citizens against the war and the war governments fight back against this opposition (month and day unknown)
A poem "War Girls" is written in Britain mentioning the fact that during the war, women had jobs that they had never had before (month and day unknown)
Trenches dug on the Western Front become more elaborate (month and day unknown)
America joins the war (Month and day unknown)
Russia completely loses the will to fight (month and day unknown)
America joins the war (Month and day unknown)
American troops begin to arrive in Europe in large numbers (month and day unknown)
38% of Krupp Armaments workers in Germany are women, due to the lack of men in the war (month and day unknown)
Britain defeats the Ottoman Empire (month and day unknown)
