The World War Z book did a good job talking about this. Things like zombies not being affected by overpressure from explosions making bombs less effective, and then ultimately the true downfall of the military: bad leaders with no clue what they were doing ordering soldiers to their deaths in stupid ways
What would you not do to save a life? Would you not break the law? Would you not interfere with “official proceedings”? “Laws are threats made by the dominant socio-political class in a given nation.” Fight back.