What does ‘military service’ mean to you?

Thank you for sending your composition today. I\'m hoping for more entries to come. You finally found the calling for being a public servant in joining the army. That\'s was marvelous. Enjoy your holiday, Sir [이름]!

~Teacher Eunice

Military service means a lot to me.

>>> correct!

I have a long story of my life in military.

>>> I have a long story about my life in the military.  

I was not a student studying hard when I was freshman in University.

>>> I was not a student studying hard when I was a freshman in University.

I should say that I really regret entering the university, because it was not same what I expected and my major was not the thing I would like to study.

>>> I should say that I really regret entering the university, because it was not what I expected and my major was not the thing I would like to study.  

I selected my major and school according to the score of college entrance exam.

>>> I selected my major and school according to the score of my college entrance exam.

So, I did not put my effort to study the subject I was learning.

>>> correct!

With this reason, I voluntarily applied the military service and had a hard time until I finished my duty.

>>> With this reason, I voluntarily applied for the military service and had a hard time until I finished my duty.  

However, I have totally changed after ending my duty in military.

>>> However, I have totally changed after ending my duty in the military.

It encourage me to study hard and I realized that I have to love myself, learn how I can enjoy my life. 

>>> correct!

In summary, if I didn\'t join the army, I wouldn\'t get a job and I wouldn\'t 채complete my degree course in university.

>>> In summary, if I didn\'t join the army, I wouldn\'t get a job and I wouldn\'t complete my degree course in university.