Under the feudal system the land was usually officially owned by the King of an area, however, it was given to nobles or in this case knights in exchange for money and loyalty. These nobles had to pledge their support for the King and their willingness to fight if there was ever a conflict that necessitated their support.
        
             
        
        
        
Hello!
Correct answer is a: trouble in the balkans United European leaders.
Hope this helps. 
 
        
                    
             
        
        
        
Answer:
A. Battle of the bulge
Explanation:
“For those who had lived through 1940, the picture was all too familiar. Belgian townspeople put away their Allied flags and brought out their swastikas,” the center writes. “Police in Paris enforced an all-night curfew. British veterans waited nervously to see how the Americans would react to a full-scale German offensive, and British generals quietly acted to safeguard the Meuse River's crossings. Even American civilians, who had thought final victory was near were sobered by the Nazi onslaught.”
 
        
             
        
        
        
George Washington. hope this helped