Tanks were used for the first time in battle, at the Battle of the Somme, during World War I.
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President Woodrow Wilson issued a Proclamation of Neutrality.
The Battle of Somme began.
During WWI, The Battle of Gallipoli concluded with an Ottoman Empire victory when the last Allied forces were evacuated from the Peninsula.
France and the United Kingdom sign the Entente cordiale.
Registration of US men aged between 21 and 31 began for troops for WWI.
