Does anybody know how to keep track of units that are
sentried in a city for defense. It seems only fortified
units are shown as garrisoned. When I look at a citys
units why can't I see all units in that city ?
Only Fortified (or Garrisoned) units are considered "in" the city. You can always see all units on a tile from the Unit Tab on the Control Panel. Just select a unit and press the right arrow that is next to the unit name on the Unit Tab. This will show the multi-view of all units and armies that are on that tile. Including the units in the city.