Infantry units

Infantry were long time serving units along with tanks and aircraft.

They served as weak armored units that require protection from fire. Through time their weakness is flame weapons, chemical weapons, nuclear radiation, snipers, and anything anti infantry.

Great WWII
The Allies ans Soviets had powerful infantry. The Allies had Mechanics and Medics for healing stuff, Rifle and Rocket infantry for attack, spys and engineers for unique stuff, and thiefs and Tanya for infiltraition. The Soviet infantry had troops for offensive purpose but had no medics.

First Tiberium War
The GDI and Nod had equal infantry. GDI had Minigunners, Grenaders, Rocket Infantry, Commandos and Engineers. Nod had the same but no Grenaders. Instead they got Flamethrowers to burn civilians. Both sides got snipers and officers that time.

Second Tiberium War
The GDI and Nod still had the same principals.

Nod had many Cyborgs, Elite Cadres, Rocket Soldiers, Light Infantry.

GDI had powerful infantry with Ghoststalkers, Light Infantry, Disc Throwers, Medics, and Jump Jet Troopers.

Third Tiberium War
Infantry were very powerful and versitile this time in Squad form.

Scrin had Disinigrators, Buzzers, Shock Troopers and Masterminds.

Nod used their infantry for swarming purpose only. They got big number of Militants elite groups of infantry and Commandos.

GDI had high tech infantry like Commandos.

They got powerful but less number of infantry. Their Riflemen Squads were well trained to build foxholes while Missile Squads were more powerful than before. They got Grenaders in the form of Squad units. They got powerful Zone Troopers, Commandos and Snipers for powerful offensive purpose.

They got Armories for healing infantry.