plasmacannon
Emperor
It sounds like you have Raging Barbarians turned on.Too many barbarians breaks the gigantic maps. They spawn every 4 turns, and there isnt the economy function that early in game to support enough units. Makes for tedious grind and eventually I just quit. I love the historical aspect however, just wish every modpack didn't include barbarian simulator.
With that turned on, yes they spawn a lot. You should only build units early on and a carpenter, warehouse and hunters cabin.
It's where you gain your xp from battling units. You should be able to get some combat 4 militia and archers after upgrading your warriors.
Those militia work well when combined with your shortswordsmen when you build them.