The main purpose of the Ku Klux Klan in the 1860s and 1870s was to "a) to intimidate blacks and white Republicans" although sometimes this intimidation led to murder.
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1st reason was that some people wanted to end slavery
 
        
             
        
        
        
Answer:
The answer is  "Manifest Destiny."
Explanation:
That doctrine states the right of the Unites States to expand westward and dominate the whole continent as design of divine Providence.  The territorial expansion of the US boundaries was seen as something inevitable. 
 
        
             
        
        
        
Other what? American revolution? British? Please tell me what your specificly are asking for me to answer on this topic!