Without the support of federal troops, segregation in the South lasted from the time of Reconstruction until 1964 and Civil rights Act, there was racial segregation in many counties in southern states till that year.
The correct answer for the question that is being presented above is this one: <span>During World War I, General John J. Pershing, commander of the American Expeditionary Forces, recommended upgrading NCO leadership training, and provided non-commissioned officers (NCOs) with separate mess facilities. </span>
The event was called the Great Purge. Several Soviet officials and high ranking people were arrested during this event. Some were even executed.
The goal was to stop the spread of Communism.
(Look into Domino Theory.)