Tax Collectors get your share of gold that your Heroes bring back. City Guards and Palace Guard defend various buildings. Peaseant, Blacksmiths and Wizard's Apprentices support your buildings. Caravans will trade with far off kingdoms, bringing in more gold. The monsters that you may have seen in our screen shots are Trolls, Goblins, Medusas, Minotaurs, Rust Spitters, Rock Golems, Giant Spiders, Giant Rats, Skeletons, Zombies and others.
Goblins are the most organized of the monsters.
They have archers, priests and champions as well as villages taht will threaten your frontiers. Trolls will attack Tax Collectors and Caravans for their Gold. Medusa and Minotaurs are high level monsters requiring adept adventures. Skeletons and Zombies might rise from your city Graveyard if too many Heroes die. Rust Spitter could ruin some of your armor or weapons and Rock Golem attack your buildings like the 3 story pile-drivers that they are.