Spring RTS Engine

Why do cannons and archers co-exist ( esp. in the medieval times)?

LOL I'd rather change "Infantry Base" to "Camp" or "Barracks"
The "advance" word is too....well, modern?

Because cannons take a long time to reload, have good range and enough weight to knock down walls. Well trained longbowmen could fire dozens of arrows a minute.

I hope you're not going to remake TA with a medieval theme. TA already exists, make something new.