A VERY interesting and important Strategy guide has begun in the Paradox forums.
http://forum.paradoxplaza.com/forum/showthread.php?539829-Pride-of-Nation-s-Strategy-Guide-Overview-and-General-Strategies
Fundamental, IMHO
Below, please find the updated pdf file (Russia, Japan, Prussia ! :thumbsup
Credit to Aragos and Kriegspieller for making this !