Guys i have some tips for you.Some of you might know them but il tell you anyways...
Once you are in battle hold position and keep as far away from the undead... while your holding position this will give you a chance to fire at them so it can be a little easy.
If they get any closer start falling back NOT RETREATING just move back while firing
And if they get more closer then your better off retreating cause its bad if your losing one of your men.Also dont go charging Like your going to knock down a door... Its a big risk losing one or more of your men DONT BE A HERO.I hope these tips helped