From an early age you were taught the ways of war and devoted your life to your kingdom and lived by the Spartan code. Your great fighting prowess and tactics are feared by all. Wounds are meaningless and pain is a normal occurrence for you and to die in combat would be to die with glory. You have mastered the spear and shield and use them as if they are a part of your body and your phalanx is impregnable. You are Sparta's last line and must live to honor that. For you it must be a honor to die bye the side of your brothers. "This is SPARTA!!!"

Unarmored defense

Beginning when you choose this archetype at 3rd level your Ac is now instead 10+Con

Master of Spear and shield

Starting at 7th level, you have mastered Spear and shield so well that your spear now deals 1d8 (1d10 versatile) instead of the normal 1d6 and your Shield now takes a bonus action to draw and you can use another bonus action to shove a opponent 10 feet back

Quick hands

At 7th level, after you score a critical hit or kill an opponent with a sword, then you may make a single melee attack as a bonus action with that same sword on the same turn.

 

Mental prowess

Starting at 10th level you cannot be frightened or charmed

Inspiring warrior

At 15th level, after getting two hits at once you can can take the option to give all allies within 15 feet of you an extra attack for one round

The power of Olympus

 At 18th level all your melee attacks deal lighting damage instead and you can cast chain lighting once per long rest