All Cities Have To Overcome This Problem in Fabledom

[@civilizaserifusa4731]

To get an army first you need to build the military training buildings Archery Range and/or (can't think of the name but looks like a pair of target dummies) depending on whether you want Archers or Swordsmen. Once built you assign fablings to them who will after training become the relevant unit. The army units follow your Hero around and engage the same target (though like the Cyclops they won't attack unless the Hero does).

[@jackdoor]

Hey, thanks for the advice, actually worked it out shortly afterwards. I did find that the troops don't follow the hero around and they can be independent.