Mudhoney didn't really get political until their 2006 album, Under A Billion Suns, but this 1990 Sub-Pop single by Mark Arm made it clear where he was coming from politically.
The A-side is an entirely earnest cover of Bob Dylan's righteous rant against the military industrial complex. If anything Arm sounds even more pissed than Dylan did in 1963. With corporations like Halliburton and Blackwater transparently setting U.S. foreign policy, there's even more reason to be pissed today.
The B-side is a twisted Bo Diddley tribute with lyrics about calcium deficiency (among other things). It's just further proof that Bo Diddley invented grunge (in addition to rock and roll, rap, R&B, heavy metal, garage rock, and pretty much every thing else). All hail Bo Diddley.