First option, legislative; executive
The purpose of the Selective Service Act (1917) was to make sure that when the country goes to war, it has enough troops to win. The first Selective Service Act was enacted during the first world war. Its main purpose was to get men registered for the draft, which in turn forced men to go to war to meet troop demands.
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Japan is an island, making it more unknown to people on larger landmasses like Europe and Asia.
