People serve their country in the military for various reasons. When we raise our hand and take the oath, we actually swear allegiance first to the constitution.
I, _____, do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; and that I will obey the orders of the President of the United States and the orders of the officers appointed over me, according to regulations and the Uniform Code of Military Justice. So help me God." (Title 10, US Code; Act of 5 May 1960 replacing the wording first adopted in 1789, with amendment effective 5 October 1962).For me, protecting the rights and freedoms of my fellow citizens was a primary motivator for me. As a result, I am offended when I see measures that threaten to strip a citizen of their vote, which is about as fundamental as you can get in a democratic government.