The history of the Great Wall of China began when fortifications built by various states during the Spring and Autumn (771–476 BC) and Warring States periods (475–221 BC) were connected by the first emperor of China, Qin Shi Huang, to protect his newly founded Qin dynasty (221–206 BC) against incursions by nomads from
        
             
        
        
        
Answer:
first box - stronger leader 
2nd box - weak leader
 
        
             
        
        
        
It was designed w/ a special sail that allowed it to sail against the wind
        
             
        
        
        
Thhhey did not need reasources.