Answer:
Serbia
Explanation:
Austria-Hungary declares war on Serbia. On July 28, 1914, one month to the day after Archduke Franz Ferdinand of Austria and his wife were killed by a Serbian nationalist in Sarajevo, Austria-Hungary declares war on Serbia, effectively beginning the First World War
 
        
                    
             
        
        
        
Answer:
to prevent conflict between colonists and American Indians in the Ohio Valley
Explanation:
The answer is to prevent conflict between colonists and American Indians in the Ohio Valley because at the end of the French and Indian War to satisfy Native Americans by checking the invasion of European settlers on their lands. 
 
        
             
        
        
        
Hey there! I'm happy to help!
The Spanish conquistadors were explorers from Spain that came to the Americas and basically took over many parts of it. Hernando Cortez brought a sickness to the Aztecs, which killed them all. Francisco Pizarro conquered the Inca empire. They are both examples of Spanish conquistadors.
I hope that this helps! Have a wonderful day! :D
 
        
             
        
        
        
<span>it made trade difficult for merchants whose business crossed state lines.</span>