I have no idea how you could interpret "getting a castle with an army" as not placing the fighter into a leadership role unless you were only familiar with the 3e version of the fighter, in which case you don't really have a place in talking about how fighters functioned in D&D up until 4e.
I mentioned that specifically in one of my earlier posts.
As for 2E, there were subsystems for everything. Lets not get into the volume of paper that TSR published during their run with 2E, it is almost impossible to name a subsystem that they don't have rules for (on the WotC boards someone pulled out a 2E published supplement that had complex and intricate rules for creating your own mining operation, complete with metal rates per pound of various ores and rules for running the refining operation).