hello, if you remember empire or napoleon you know whats up. so i guess something along the lines of winter clothing, lorica segmented armour. and if you researched a certain amount of things, say 15 the marius event would take place. and the greeks could have an extra 10% research rate. so for every ten or twenty things you research a reform would happen. like the phalanx reform ect. so yeah something along the lines of that. because i really hated that you could get the marius reform in like 300bc
the barbarian faction could get things like boars snout formation, or the crecent formation for the carthaginians. endless possibilities really. i want this to be the greatest total war of all time, and i want the tech tree to contribute