Among the countries listed, the one that was not created following World War I is likely the United States. The U.S. was established long before the war, gaining independence in 1776. Other countries that emerged after World War I, such as Czechoslovakia and Yugoslavia, were formed as a result of the geopolitical changes following the conflict.
Germany
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england and france
Turkey and Poland
Germany (apex)great britain
Great Britain A+
Austria-Hungary was separated into two different countries Austria and Hungary
Countries economies became more interconnected following World War I APEX
US and USSR
9
Austria and Hungary
Both were total wars that involved countries' entire populations :)
Germany
Great Britain and France
mexicans
Turkey and Poland.