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
Yeah I remember that part! They brought SAM launchers, radar, jammers and camo netting to a zombie fight.
I really like how they showed the military adapting though. Flying C-130s sparingly to save fuel. Running attack dirgibles, and returning infantry to formation tactics with .22 rifles and bite resistant suits.
"Here's the purchase order. Good to pick up next Friday?"
Not a fan of the movie, but Brad Pitt taping magazines around his forearms for armor was brilliant. Light, 100% tooth-proof, easy to shed, easy to replace, all that.