It depend on the geography, but here a little tip.
As you know you dont need military police in your city under democraty, what you need is fast units like cavalry. So disband all old units ( swordman, spearman. pickman ect..) , disband every units you dont need until your advisor say you are weak compare to them.
Be carefull, keep like i said a nice little stack of fast units ready to counter attack, because if you are weak compare to them, they will declare war on you. You have to know how to wage war with a weak military, like keep only defense on border city, or attack only units on plain or grassland ( no defense bonus ), use artillery, take and capture 2-3 a.i. city then contact them for peace and ask for gold per turn ( they will pay ).
In modern time, i use marine supported by bomber, this prevent me having troop into their cultural border ( war weeariness is minimum).