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If the US never entered the war, say unrestricted submarine warfare never went into effect, how much longer would WW1 have lasted? I know both sides were facing morale and supply difficulties so I dont see it lasting much longer, but I'm unsure on the length. Also who would end up winning or would it be a large scale white peace?
Apologies if this question has been asked before, I mostly like viewing the maps and graphics section, so I don't keep up with what has been asked.
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