Heavy Infantry is a type of infantry units in Rise of Nations. They are the first type of military unit to become avaliable, alongside Light Infantry and Foot Archers, and remain important throughout the game - Unlike other infantry types, their equipment may change, but they never upgrade to a new type. They are trained and upgraded at the Barracks, requiring both Food and Metal ( Timber instead of Metal in the Ancient Age).
Heavy Infantry units are slow-moving, but very durable soldiers donning heavy armor and having the highest amount of hit points of all infantry. Their role in combat is to fight cavalry, ranging from mounted units in the early ages to armored vehicles and heavy tanks in the late game. They can be somewhat effective against Artillery Weapons and Support Units as well, but are very weak when having to fight Foot Archers, Gunpowder Infantry, Modern Infantry, and late game Machine Guns. In the earlier ages, they are also effective against buildings such as Cities, though Artillery Weapons rapidly become superior with each successive age, diminishing their role as besiegers.
Starting out as close-range fighters, mostly with spear and shield, and later pikes, they retain their melee role until the Gunpowder Age, protecting the powerful but vulnerable Gunpowder Infantry from the onslaught of cavalry. In the Enlightenment Age the Heavy Infantry retains this very role, but now replacing the pike with the flintlock, increasing the unsafe distance for cavalry to approach. In the Industrial Age onwards they become the answer to cavalry's transition from animal to engine, and adopt anti-tank weaponry.
|Ancient Age||Hoplites||Heavy Infantry|
|Classical Age||Phalanx||Heavy Infantry|
|Medieval Age||Pikemen||Heavy Infantry|
|Gunpowder Age||Elite Pikemen||Heavy Infantry|
|Enlightenment Age||Fusiliers||Heavy Infantry|
|Industrial Age||Anti-tank Rifle||Heavy Infantry|
|Modern Age||Bazooka||Heavy Infantry|
|Information Age||Anti-Tank Missile||Heavy Infantry|