Hearts of Iron 3
whats core mean? been editing manpower and just want edit the right countries..
I first come across this core in Victoria 2. In that, it was casus belli if somebody had a province that have a core of your nation. (Hungary had a little CB for all neighbors because the 1920 Treaty of Trianon) Hungarians lived there, so Hungary had a core in that romanian, slovak etc. region. I don't know if it means any production bonus though, or if it's a CB in HoI3.