British conscription law goes into effect

The longest battle of the war, the Battle of Verdun, is fought to a draw with an estimated one million casualties.

Photo: Dead French soldiers in trench

Canadians take Vimy Ridge

US President Wilson publicly warns Germany not to continue unrestricted submarine warfare policies

Photo: President Woodrow Wilson

The Battle of Jutland, the only major naval engagement of the war is fought with no clear winner.

The Battle of the Somme results in an estimated one million casualties and no breakthrough for the Allies. British introduce the tank, an effective weapon but far to few to make much of a difference.

Woodrow Wilson re-elected President of the United States with campaign slogan: "He kept us out of the war"

Photo: President Wilson in the White House

David Lloyd George becomes Prime Minister of Britain.

Rasputin, the self-avowed holy man and confidant to the Tsarina, is murdered by relatives of the Tsar.