the flow of the trees is weird
also Tristan you mixed up navy techs with aircraft and vice versa
this was intentional so i could make the navy title blue
also the way it works is that any specific tech requires all techs to the left of it and above it; it's not how i would have designed the tree, but nonnel's the one who designed it so--
I hope it still means you don't need a main battle tank for mounted machine guns on armoured cars, because I designed it with the tech going down/getting upgraded
that is not at all how nonnel described it to me
i adjusted the post so that the tiers are less colorful