population - the total amount of troops, villagers, mechanics, monks, siege weapons, healers, Horses, cows and sheep.
population base limit - limit on building ones own troops activates
The population base limit is 175.
If you wish to surpass the base limit, you need to purchase either the St Basil and/or Alexandria and/or Babylon Gardens Building. Please note only these three buildings can add to the amount population base limit.
Houses do not increase population past the base limit they allow you to house population and grow your population to the base limit
The St Basil building Will surpass the base limit by 25, the population base limit would be 200
The Alexandria Building will surpass the base limit by 50, the population base limit would be 225
The Babylon Gardens building will surpass the base limit by 50, the population base limit would be 225
The St Basil and the Alexandria buildings together will surpass the base limit by 75, the population base limit would be 250 add the Babylon Gardens building the population limit would be 300
Once you surpass the population base limit you will not be able to build troops for your empire again until the population falls below the population base limit.
Population limits on particular units