I think you forgot to give the options along with this question. I am answering the question based on my knowledge and research. The historical event that would be most useful to include would be President Johnson's escalation of the Vietnam War after the Tonkin Gulf incident. I hope the answer helps you. <span />
        
             
        
        
        
 
as Russian was complicated state it was obligated to start changing in order to advance
 
 
        
             
        
        
        
You answer is;
<span>Russia kept its treaty with India even though India was at war with China. 
Russia refused to help Red China as it developed a nuclear weapons program.</span>
        
                    
             
        
        
        
1Aztecs die
2jamestown is founded
3george Washington
4delagates