Using your degree really depends on what you decide to do, luck, GPA (yes it can matter), and what your degree is.
Initially, it really won’t matter unless you are trying for cyber, med school or some other nitch specialty. There can be exceptions, such as being based in a country where you can use your language. As a LT, however, the ability to use your language is almost always secondary and just a by product of being stationed in that country.
As you become more senior, however, your major can matter. Some specialties that may interest you as a captain may require certain majors. If you go aviation and want to be an XP (experimental test pilot) for example, you will need to attend test pilot school and an engineering degree is a prerequisite.
Other majors, while not required, may help you. Again, using aviation as an example, having some knowledge of physics and engineering will probably help you in flight school. I was a German Lit and European history major and I made it through flight school, but I studied much more than the USMA engineering majors.
And to show you the logic of the military I could never get based in Germany. 2 1/2 years in Korea, 7 months in the French Sahara, 3 months in Central America, a year in the Middle East, but never Europe much less Germany.