Detailed Instructions: Generate a correct and concise answer for the question based on the words in the context.
Problem:Context : Eugene A. Greene (1921--1942) was a United States Navy officer who received the Navy Cross posthumously for his actions in the Battle of Midway during World War II. 
Question : In what military organization did Eugene A. Greene serve?
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
United States Navy