Right now I’m enroll in the MSCI 201 i have two semesters left to earn my bachelors degree however, I have to apply for graduate school?

Talk to your military science professors and they will help you with the best course of action. If you choose military science as a minor that could add a few more semesters.

You need to come up with an academic plan/proposal of how you will finish you degree AND your Military Science requirements. Plan out what courses you will take in what semesters. You need to coordinate that plan with your MS Professors. Keep them in the loop. I was able to finish my AFROTC program a little early by doubling up on some courses and taking a special summer AFROTC class. It was a unique arrangement set up by my Professor of Aerospace Studies. I would come to his office one or two times per week and I would have to brief him on the reading lessons that I had the previous week. They were willing to work with me so I could complete my program. I graduated in March, was commissioned the same day, and was on active duty 2 weeks later. A side benefit was that I had an early date-of-rank for my year group and was usually promoted within a few months after the promotion list came out.

One of the cadets in my commissioning class was a PhD candidate....

It is all up to your Chain of Command.

Ask them, not the internet.