Defending Provinces.

How do you guys defend provinces when your capital is in the middle of a bunch of terrotories, and there are no choke points. Mainly early game.
For example:
M=My Province
C=My Capital
T=Enemy Territory.
TTTTTTTT
TTTMTTTT
TMMMTMT
TMCMMMT
TMMMTTTT
TTTTTTTTT
I find I can not put enough men in each province to defend it, because the enemy can strike anywhere,while I have to defend them all. And I do not have enough cash for a good amount of PD per province.