At the start of world war ii, which country maintained an isolationist policy?

The United States was the major isolationist country.

Many other countries were already at war either because they declared war, or their colonizers declared war. Very few other countries remained as isolationist countries, as they saw benefit in joining either one side or the other.

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there were 6 major base camps.   the base camps were located in alva, fort reno, fort sill, the madill provisional internment camp headquarters, mcalester and camp gruber.