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Battle of Tannenberg
The Battle of Tannenberg in 1914 pitted the Russian and German Empires against each other at the beginning of World War I, near the town of Allenstein in East Prussia. This engagement proved to be of considerable importance in the Great War.
The battle resulted in the near total annihilation of the Russian 2nd Army, and a series of battles immediately following destroyed most of the Russian 1st Army as well, leaving Russia in a very poor state of war until the spring of 1915. -
Start of the war
The cause that triggered the outbreak of the first war was the assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian crown, and his wife, Archduchess Sophie.
The Western Front opened in 1914 after the army of the German Empire invaded Belgium and Luxembourg, gaining military control of important industrial areas of France.
The Eastern Front began with a Russian offensive against Germany in August 1914. -
Battle of Galipoli
The battle began in February 1915 with a massive bombardment from British and French warships against the Ottomans defending the strait, which failed due to the presence of mines in the sea laid by the Turkish military. This failure prompted commanders and governments to call for a combined British-French landing operation to conquer the Ottoman capital of Istanbul. Control of the Straits would allow France and the United Kingdom to revitalise the Russian Empire and encircle the Central Empires.