Hoplite

Leonidas and his Spartans held their ground. They had made up their minds to die at their post. Some one brought them word that there were so many Persians that their arrows dark-ened the sun. "So much the better," said the Spartans; "we shall fight in the shade." Bravely they stood in the narrow pass. Bravely they faced their foes. To Spartans there was no such thing as fear. The Persians came forward, only to meet death at the points of their spears. But one by one the Spartans fell. At last their spears were broken; yet still they stood side by side, fighting to the last. Some fought with swords, some with daggers, and some with only their fists and teeth.

All day long the army of the Persians was kept at bay. But when the sun went down, there was not one Spartan left alive. Where they had stood there was only a heap of the slain, all bristled over with spears and arrows.

Twenty thousand Persian soldiers had fallen before that handful of men. And Greece was saved.

Shield Wall

At the third level when you take this Archetype, if you are within 5ft of an ally and are using a shield you get +1AC

Spear Mastery

At the 3rd level, while you are using a shield you may use 1d8 instead of 1d6 as damage roll with Spears. Spears that you use now have reach. (This weapon adds 5 ft to your range when you attack with it)

Shield Bash

Beginning at the 7th level, you can use your shield as a weapon and attack with it as a bonus action. The shield deals 1d4 + ½ Strength Modifier in bludgeoning damage.

Formation Fighter

At the 10th level if an ally is attacked within 10ft of you, you can make an attack of opportunity against the attacker.

Spartan Strength

At the 15th level, when you make a successful spear attack against an enemy, if you shield bash them, they have to make a Dexterity Saving Throw of DC (8 + Proficiency + Strength Mod) or be knocked prone.

Spartan Charge

When you reach the 18th level, once per day you may increase your range with your spear by 5ft, and if you hit, you may move 10ft towards them and make another spear attack against them.