| Building Overview | Technologies | Game Strategies | CBP Version | History |
Two technology lines can be researched at Towers: Attrition and Militia.
Attrition[]
Attrition technologies enables attrition damage in your territory: unsupplied enemy troops constantly take small amounts of damage and ultimately die from it. This essentially prevents enemies from doing imprudent raiding and harassment attacks. Further research increases damage from attrition.
| Technology | Cost | Requires | Effects |
|---|---|---|---|
 Allegiance |
80  80 
|
 Classical Age Civic 1 (City State)
|
Attrition damage level 1 |
 Oath of Fealty |
150 150
|
 Medieval Age Civic 2 (Empire)Allegiance |
Attrition damage level 2 |
 Patriotism |
300 300
|
 Enlightenment Age Civic 4 (Divine Right)Oath of Fealty |
Attrition damage level 3 |
 Nationalism |
450 450
|
 Modern Age Civic 6 (Great Power)Patriotism |
Attrition damage level 4 |
Militia[]
Militia technologies unlock the 
To Arms! ability for Citizens and Scholars, allowing conversion to Militia. Armed Citizens/Scholars can provide a last line of defense if other troops aren't available or already dead, or otherwise bolster an army in a difficult fight.
| Technology | Cost | Requires | Effects |
|---|---|---|---|
 Militia |
80  80
|
Classical Age Military 1 (The Art of War)
|
Citizens and Scholars gain To Arms! ability. To Arms! converts Citizens and Scholars to Militia. Citizen maximum HP increased to 50 (+10), and LOS increased to 4 (+2). Towers gain +1 attack range. |
 Minuteman |
300 300
|
Enlightenment Age Military 4 (Conscription)
|
To Arms! converts Citizens and Scholars to Minutemen. Citizen maximum HP increased to 65 (+15), and LOS increased to 6 (+2). Towers gain an additional +1 attack range. |
 Partisan |
600 600
|
Modern Age Military 6 (Nation-in-Arms)
|
To Arms! converts Citizens and Scholars to Partisans. Citizen maximum HP increased to 80 (+20), and LOS increased to 8 (+2). Towers gain an additional +1 attack range. |