During World War I, Japan officially declared war on Germany.
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Unofficial ceasefires sprang up across World War I's Western Front.
American Army Corporal Alvin York and seven men attacked a major German gun nest on their own during World War I.
The last Australian troops were evacuated from Gallipoli during World War I.
Britain declares war on Germany.
Registration of US men aged between 21 and 31 began for troops for WWI.
