Military Buildings

Military Buildings are a class of structures in Rise of Nations, which are mostly used for creating and upgrading military units, as well as defending your settlements from enemy intruders.

Overview

Modern Military Buildings.

There is no actual limit on how many Military Buildings can be built within your nation's territory. But there is some limitation for the Forts placement, as they cannot be built too close to Cities and other Forts.

Rise of Nations has 21 Military Buildings available to build. (There is also Red Fort, which acts like a Military Building (Fort), but it's technically a Wonder.)

Some buildings are available from the very beginning, while others can only be built after reaching a specific Age. Additinally, most buildings must be unlocked by researching certain technologies at the Library.

List of Military Buildings

Ancient Age

Four military buildings are available from the very beginning.

Building	Information / Role / Bonuses	Cost
Barracks	Primary role: Allows to recruit and upgrade military units. Unit creation: Infantry, Scouts.	Base cost 120 Ramping cost 25
Dock	Primary role: Allows to recruit and upgrade naval Military and Fishermen units. Also, allows all land units to cross a body of water. Unit creation: Naval Units. Bonuses: Enables the colonization of new continents. Upgrades to: Anchorage / Shipyard. (The upgrades are purely aesthetic in nature, reflecting the improvement in building materials and technology.)	Base cost 70 Ramping cost 30
Lookout (Detector)	Primary role: Detects invisible units within its Line of Sight and lifts the Fog of War within a certain range. Upgrades to: Observation Post	Base cost 60 Ramping cost 4 2
Tower (Tower-type)	Primary role: Automatically attacks enemies within its Line of Sight, and can be garrisoned. Upgrades to: Keep Technologies: Attrition enables and increases the attrition damage in your territory for all unsupplied enemy troops. Militia unlocks the To Arms! ability for Citizens and Scholars, allowing conversion to different kinds of Militia units. Also, increases the Hit points and Line of Sight of Citizens, and improves the attack range of all Towers.	Base cost 30 50 Ramping cost 10 25

Classical Age

Three military buildings become unlocked after reaching the Classical Age.

Building	Information / Role / Bonuses	Cost
Stable	Primary role: Allows to recruit and upgrade military units. Unit creation: Cavalry (except for Vehicles). Upgrades to: Auto Plant	Base cost 120 Ramping cost 25
Siege Factory	Primary role: Allows to recruit and upgrade military units. Unit creation: Artillery Weapons, Supply Wagons. Upgrades to: Factory	Base cost 60 60 Ramping cost 25
Fort (Fort-type)	Primary role: Automatically attacks enemies within its Line of Sight, and can be garrisoned. (More effective than Tower-type buildings, but much more expensive.) Unit creation: Generals. Bonuses: Expands National borders. Upgrades to: Castle Technologies: Fortification increases the Line of Sight, attack range and maximum garrison capacity of all Forts. Also, increases the effect of all Forts on National borders. Strategy improves the Generals and Spies in many ways (including their line of sight, range, speed and hit points).	Base cost 100 300 Ramping cost 25 75

Medieval Age

Two military buildings become unlocked after reaching the Medieval Age.

Building	Information / Role / Bonuses	Cost
Keep (Tower-type)	Primary role: Automatically attacks enemies within its Line of Sight, and can be garrisoned. Upgrades from: Tower Upgrades to: Stockade Technologies: Attrition enables and increases the attrition damage in your territory for all unsupplied enemy troops. Militia unlocks the To Arms! ability for Citizens and Scholars, allowing conversion to different kinds of Militia units. Also, increases the Hit points and Line of Sight of Citizens, and improves the attack range of all Towers.	Base cost 30 50 Ramping cost 10 25
Castle (Fort-type)	Primary role: Automatically attacks enemies within its Line of Sight, and can be garrisoned. (More effective than Tower-type buildings, but much more expensive.) Unit creation: Generals, Spies. Bonuses: Expands National borders. Upgrades from: Fort Upgrades to: Fortress Technologies: Fortification increases the Line of Sight, attack range and maximum garrison capacity of all Forts. Also, increases the effect of all Forts on National borders. Strategy improves the Generals and Spies in many ways (including their line of sight, range, speed and hit points).	Base cost 100 300 Ramping cost 25 75

Gunpowder Age

One military building becomes unlocked after reaching the Gunpowder Age.

Building	Information / Role / Bonuses	Cost
Observation Post (Detector)	Primary role: Detects invisible units within its Line of Sight and lifts the Fog of War within a certain range. Upgrades from: Lookout Upgrades to: Air Defense Gun	Base cost 80 60 Ramping cost 15 15

Enlightenment Age

Two military buildings become unlocked after reaching the Enlightenment Age.

Building	Information / Role / Bonuses	Cost
Stockade (Tower-type)	Primary role: Automatically attacks enemies within its Line of Sight, and can be garrisoned. Upgrades from: Keep Upgrades to: Bunker Technologies: Attrition enables and increases the attrition damage in your territory for all unsupplied enemy troops. Militia unlocks the To Arms! ability for Citizens and Scholars, allowing conversion to different kinds of Militia units. Also, increases the Hit points and Line of Sight of Citizens, and improves the attack range of all Towers.	Base cost 30 50 Ramping cost 10 25
Fortress (Fort-type)	Primary role: Automatically attacks enemies within its Line of Sight, and can be garrisoned. (More effective than Tower-type buildings, but much more expensive.) Unit creation: Generals, Spies. Bonuses: Expands National borders. Upgrades from: Castle Upgrades to: Redoubt Technologies: Fortification increases the Line of Sight, attack range and maximum garrison capacity of all Forts. Also, increases the effect of all Forts on National borders. Strategy improves the Generals and Spies in many ways (including their line of sight, range, speed and hit points).	Base cost 100 300 Ramping cost 25 75

Industrial Age

Four military buildings become unlocked after reaching the Industrial Age.

Building	Information / Role / Bonuses	Cost
Auto Plant	Primary role: Allows to recruit and upgrade military units. Unit creation: Cavalry (Vehicles, such as tanks and armored ranged cavalry). Upgrades From: Stable	Base cost 120 Ramping cost 25
Factory	Primary role: Allows to recruit and upgrade military units. Unit creation: Anti-Aircraft units, Artillery Weapons, Supply Wagons. Upgrades From: Siege Factory	Base cost 120 Ramping cost 25
Airbase	Primary role: Allows to recruit and upgrade military units. Unit creation: Aircraft.	Base cost 80 70 Ramping cost 25 25
Air Defense Gun (Detector) (Anti-Aircraft)	Primary role: Automatically attacks hostile Aircraft within its Line of Sight. Also, detects invisible units and lifts the Fog of War within a certain range. Upgrades from: Observation Post Upgrades to: Radar Air Defense	Base cost 120 120 Ramping cost 25 25

Modern Age

Four military buildings become unlocked after reaching the Modern Age.

Building	Information / Role / Bonuses	Cost
Missile Silo	Primary role: Allows to recruit and upgrade military units. Unit creation: Missiles.	Base cost 80 70 Ramping cost 50 50
Radar Air Defense (Detector) (Anti-Aircraft)	Primary role: Automatically attacks hostile Aircraft within its Line of Sight. Also, detects invisible units and lifts the Fog of War within a certain range. Upgrades from: Air Defense Gun Upgrades to: SAM Installation	Base cost 120 120 Ramping cost 25 25
Bunker (Tower-type)	Primary role: Automatically attacks enemies within its Line of Sight, and can be garrisoned. Upgrades from: Stockade Technologies: Attrition enables and increases the attrition damage in your territory for all unsupplied enemy troops. Militia unlocks the To Arms! ability for Citizens and Scholars, allowing conversion to different kinds of Militia units. Also, increases the Hit points and Line of Sight of Citizens, and improves the attack range of all Towers.	Base cost 30 50 Ramping cost 10 25
Redoubt (Fort-type)	Primary role: Automatically attacks enemies within its Line of Sight, and can be garrisoned. (More effective than Tower-type buildings, but much more expensive.) Unit creation: Generals, Spies. Bonuses: Expands National borders. Upgrades from: Fortress Technologies: Fortification increases the Line of Sight, attack range and maximum garrison capacity of all Forts. Also, increases the effect of all Forts on National borders. Strategy improves the Generals and Spies in many ways (including their line of sight, range, speed and hit points).	Base cost 100 300 Ramping cost 25 75

Information Age

One military building becomes unlocked after reaching the Information Age.

Building	Information / Role / Bonuses	Cost
SAM Installation (Detector) (Anti-Aircraft)	Primary role: Automatically attacks hostile Aircraft within its Line of Sight. Also, detects invisible units and lifts the Fog of War within a certain range. Upgrades from: Radar Air Defense	Base cost 120 120 Ramping cost 25 25