World War 1 can be mainly attributed to the assassination of Archduke Franz Ferdinand, however there were other underling factors, the complicated web of alliances for example, drew other countries who had no business being in the war into it. another cause of the war was that it was right after a period of high tension, with the Archduke's assassination being the point of no return.
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Over 30,000 people left the country and went to Canada, Sweden, and Mexico to avoid the draft. The Japanese anti-war group Beheiren helped some American soldiers to desert and hide from the military in Japan.
Fluid borders make running a business in the EU so much easier becasue of the lack of stringent border contols.