Let's make one thing crystal clear, no member of the US military contributes in any way whatsoever to protecting the freedoms of the American people. As a matter of fact, they are more likely to turn their weapons on you than they are to defend your Constitutional rights.
The only people on this planet Earth who can affect your freedom are members of Congress, local legislatures and the members of enforcement institutions who will blindly follow the rulers who sign their paychecks. And, while your beloved troops are murdering people around the globe, yes, I said murdering, your Congress and local legislators are eliminating your freedoms, en mass, without any intervention by our so-called protectors in the armed forces.
UPDATED....To understand the REAL mission of the US military, and the real impact the US has on DESTROYING democracy and freedom around the world...listen to this confession of a US economic hit man...link.