>>2165912
>Research is pretty simple
practicals and theoreticals might not be complicated but they are tremendously important and easily neglected
you cannot, unlike in other games, invent the best tanks in the world without ever having produced a single tank
it's very easy to spread yourself thin, particularly with air
i wish we had a mix of hoi2 companies and hoi3 practicals but alas hoi4 is just trash
>>2167271
air force is pretty weak until 1940 then it really starts to scale and by the late war it is massively powerful
>>2167275
corps is (very poor) reinforce chance which is almost meaningless once you have radio and if you synchronize attacks
what matters most at this level is traits imo since divs inherit 50% of them
>>2165857 (OP)
just play the game and ask specific questions or post your campaign
vanilla really isn't that difficult and the ai isn't great
you can automate anything you don't want to deal with (many people automate trade as an example)
>I can see some things like the production system are very similar in HoI3
practicals are very different to the gearing bonus and you cannot ignore them - at 0 practical you have a massive 50% time and ic penalty, at 5 you have 0%, at 15 you have -15%, and at 50 you have -33%
this is applied to categories so investing early into tanks, as an example, even though you don't need or want them now, is important to transition easily into them later
as much as a good oob makes a difference it is not the most important thing
army group and division level are the most important so put your best leaders here