Originally Posted by
burrek
I like this idea.
Here are my 2 cents:
Keep the separate building trees with the following exception:
For both castles and cities make all basic militia units, spearmen, town, archer, crossbowmen, pike, be recruitable from the first tire military building and control the type available as time progresses rather than based on buildings.
1100-1200 only archers (long recruitment) and spearmen
1200-1300 only crossbowmen and spearmen
1300-1400 only crossbowmen, spearmen, and pike(halberd)men
1400-1500 only handgunners, crossbowmen, pikemen
Any more advanced military buildings would allow training of higher tire units.
Castles
tire 2 - knights (expensive and with long recruitment delay)
3 - sergeants (cheap, better than militias)
4 - advanced units (zweihanders, norse axemen, musketeers, lancers, etc.)
5 - more advanced units
Towns
tire 2 - cavalry militais
tire 3 - men-at-arms
tire 4 - advanced units
tire 5 - regular armies
That way each tire is not bound to a specific unit but rather a unit type which then can be changed depending on time period.