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Eh, well if you want specific dates.....September 1st, 1939-September 2nd, 1945 for WWII....June 28th, 1914-November 11th, 1918 for WWI. Britain joined the second conflict in what I think was September 3rd, 1939 after the invasion of Poland. But if you want a general time period...some might consider it in the 'Modern era'

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13y ago

What else can I help you with?