Hey guys here some tips on how to kill the soldier easily:
Tactic 1) Use a auto firing weapon like AK, MP, M4A1 and Uzi (Recommended Uzi) and shoot at their legs since it's defenseless.
Tactic 2) If the zombies aren't blocking your aim you should use the sniper rifle, Try aiming for their head under the helmet as it will instanly one shot them.
Hopefully this will hope you on your survival. See ya.