Ferrim said:But the thing is... I can't see the "specificity" of doctrines... I mean, take your pic. If I develop the "Assault Humain Doctrine", which is a UK doctrine according to the tree, then the next doctrine I would expect to study is the "Guerre de mouvements", which is another UK doctrine, but actually the only doctrine I can research is the "Guerre des Tranches". And then, after I've researched that doctrine and the "Guerre d'Atrittion" one, the next doctrine I can research is... again "Guerre de Mouvements", but now the first one of the France/Italy brench of the tree.
When I see that picture I expect to research the doctrines from the first one under the name on the country (Assault Humain for the UK according to the pic) to the last one (Armes combinées) but instead, you switch from brench to brench as you do research.
In the end that means that when I research a doctrine, I don't know which one will I be able to investigate after that one! Because it "switches" from a brench to another.
Is this just happening to me or it's intended to work this way?
I've personnally tested UK and didn't see any problems. Are you playing UK or don you just want to follow the UK tree ? If so, you're not able to, only UK (and commonwealth and puppets) are allowed to research these techs.