The Senate refused to ratify the treaty of Versailles primarily because they objected to the League of Nations. If the US joined the League, then they would be obligated to fight in future wars and the Senate didn't want that.
        
                    
             
        
        
        
1) PATRIOTISM
Americans fought for their freedom so their motivation was unstoppable.
2) WAR WAS ON OUR TERRITORY
Americans knew the layout of their land.
3) FRENCH
The French helped the Americans with supplies and weapons.
        
             
        
        
        
Monarchs are mostly popular figureheads. They keep the country stable with their presence. Some countries still have Absolute Monarchs (A King or Emporer with all power). Most kings and queens are exempt from being convicted of crimes, and can desolve parliament and remove anyone from the government.
        
                    
             
        
        
        
Answers: Was to preserve the Union rather than concentrate on the issue of slavery. Lincoln was prepared to take any actions to save the Union regardless of the slaves being held and laboring in the South.
Hope it helps. 
 
        
             
        
        
        
Answer:
The Americans never paid back the French for their supplies and help in the revolution, which made the French economic crisis even worse