This lesson should be renamed "Settlers of Catan"
Corinna quoque "Longissimam Viam" et "Maximum Exercitum" habet.
Or "Sid Meier's Civilization"!
Shouldn't urbes be urbem because of delcintions?
The singular accusative ("Corinna builds a city") is urbem, but the plural accusative ("Corinna builds four cities") is urbes.