Tech Tree
A web, not a list. Three arms — the victory axes — radiate from a central hub, and you path outward from any of them: minor nodes into notable historical techs. You spend research earned during a match, and what you allocate carries from phase to phase across the campaign — but every few nodes the next one costs more, so a full run buys most of the web, never all of it.
Minor — +1 stat (path filler) Notable — historical tech