The correct answer is the Battle of the Coral Sea
Although both sides were winners in certain respects, it was a draw in the end which was a bad thing for Japan. The Japanese army had a tactical victory through the numbers of US troops defeated and ships sunk, the US had a strategic victory because Japan could not prepare for the following battles because of the losses suffered in this one.
        
             
        
        
        
Pyongyang is the capital of North Korea.
        
                    
             
        
        
        
Answer: Grant used a sneak attack.
Explanation: to have more of an advantage and to catch them by surprise.