What was the main goals of the union blockade in the south

the protestant reformation's started in 1517, disturbing the religious and political order in europe´s catholic countries. the outcome was the european wars of religion prosecuted in europe in the 16th, 17th and part of the 18th century. nonetheless, uprisings, territorial disputes, and great power conflicts were also causes of the wars.  

during the 1920s the goal of the united states was not letting business collide or go down or even compete this was due to wwl