The Gondorian military force was arguably the strongest force to oppose Sauron and Mordor during the War of the Ring. The Gondor Soldiers are the basic infantry units of the Gondor faction and are equipped with metal armor and metal shields but these can only hold out against a few hits, they must be upgraded with heavy armor in order to resist better. They can be recruited from the Barracks from which they will emerge in battalions of 15 units.
Gondor Soldiers have access to the following upgrades:
Banner Carrier - This upgrade can only be given to a level 1 battalion and will promote it to level 2. At level 2 the battalion can regenerate units when out of combat. Cost: 200
Heavy Armor - Increases the armor, hit points and damage resistance of the unit to ranged damage. Changes the unit's armor set to EdainInfantryHeavyArmor. Cost: 300
When Denethor's "State of Emergency" ability is in effect, Gondor Soldiers may be recruited 50% cheaper but are unable to receive any upgrades. They are also unable to use their "Shield Wall Formation" ability.
Gondor Soldiers are the most basic Gondor units. They are cheap, so you can spam them if you have the resources needed for it. They are strong against pikemen, so you can use them to protect your cavalry from them. They can remain useful until late-game, but the Dol Amroth Soldiers outclass them. In addition, they are inferior to Tower Guards even though those are meant to be elite pikemen. In summary, you can use them early game to rush the enemy but should consider investing in more elite units for the late game.