World War 1 1915 timeline

By IRM22

  • Twenty-One Demands

    The Twenty-One Demands were a set of demands made during the First World War by the Empire of Japan to the government of the Republic of China.

  • First German Zeppelin attacks on Britain

  • 1st use of Poison Gas

    First German use of poison gas at Bolimow on the Eastern front

  • German Blockade

    German U-boats attack Allied shipping. Germany declares a blockade on Britain. All ships traveling throught the "war zone" could be attacked by German U-boats.
  • Period: to

    Second battle of Masurian Lakes

  • First British Passenger ship is sunk by U-boats

  • Period: to

    Second Battle of Ypres

    First use of poison gas by the Germans in the Western Front. Ended in stalemate.

  • British force landing at Gallipoli

    British land troops at Gallipoli.
  • Period: to

    The Gallipoli Campaign

    A series of battles between the British and Ottomons for the peninsula of Gallipoli.

  • Treaty of London

    The Treaty of London was a secret pact between the Triple Entente and the Kingdom of Italy.

  • Sinking of the Lusitania

    Germans attack and sink the Lusitania, with Americans on board, this leads to U.S. entry into the war.

  • Italy enters War

  • German troops occupy Warsaw

  • British land on Gallipoli

  • Great Retreat of 1915

    As the Russians retreated after the Garlice-Tarnow offensive they committed many atrocities against civilians and enemy nations around the area.

  • Tsar Nicholas II takes command of the Russian army

  • Serbia and Bulgaria declare war on each other

  • Period: to

    Battle of Loos

    A major British offensive against the Germans. Attempt to break the defensive lines and create another war of movement. British victory.
  • Period: to

    Battle of Campagne

    French offensive to break through German defensive. Eventually the Germans are able to repel the attack and the French abandon their attack. First time Britain used poison gas.

  • Central Powers invade Serbia

    Germany and Austria-Hungary invade Serbia.

  • Britain declares war on Bulgaria

  • Douglas Haig replaces John French

    Sir Douglas Haig replaces Sir John French as the commander of the British Expeditionary Forces