Roman Legionary

Professional soldiers and warriors of various empires throughout time, Imperial legions strike fear and awe into both the citizens they protect, and the savages they conquer. Legionnaires find themselves comfortable standing shoulder to shoulder with one another , battling on the field in specialized formations. These men are disciplined, well trained, elite heavy infantry who serve as the bulk of their Empires fighting force. 

Legionnaire Formations

Beginning when you choose your archetype at 3rd level, your mastery of tactics and infantry formations allow you to increase the combat effectiveness of you and your allies. You gain access to the following list of formations. During a combat encounter, you can use an action to activate a formation. Only one formation can be active at a time. The formation is active until you take an action to end it, take an action to change it, or the end of the current encounter.

Aggressive Formation:  While using this formation, you can use your reaction to use the Help action to give advantage to an attack roll your ally makes, as long as that ally is within 5 feet of you.

Defensive Formation: While using this formation, if an ally within 5 feet of you is attacked, you can use your reaction to increase the AC of that ally by the AC bonus of the your shield against that attack. (Must be wielding a shield to use this formation)

Ranged Formation: While using this formation, whenever you make a ranged weapon attack, an ally within 5 feet of you can use their reaction to make a single ranged weapon attack as well. 

Disciplined Formation: While using this formation, you and any allies within 5 feet of you have advantage on saving throws against being frightened. 

Construction Work

The Legion never spent all of its time in battle. Often times, Legionnaires would need to work on construction projects, and many Legionnaires were skilled craftsmen. Starting at 3rd level, you gain proficiency with the following artisans tools: Mason's tools and Carpenter's tools. 

Fortifications

Starting at 7th level, You gain the ability to create temporary fortifications outside of battle. During a short rest, you can spend 1 hour working to complete one of the following fortifications.

Trench: If you are on workable ground, you can dig a trench that is 5 feet deep, 5 feet wide, and 30 feet long. 

Wooden Pavises:  If you have access to workable wood, you can spend time crafting 3 mobile wooden parapets known as Pavise. These Pavises are large portable wooden shields that are placed on the ground. They are 4 feet tall and 2 feet wide. A creature can use an action to pick up a pavise, use an action to put it down, and moves at half speed while holding it. The pavise have an AC15 and 25 hp. 

Pilum Expertise

Starting at 10th level, You can draw and make a ranged attack with a Javelin, Spear or Trident as a bonus action. 

Decanus formation

Your experience in the Legion and leadership potential has brought you to the rank of Decanus, increasing the effectiveness of your formations. Starting at 15th level, the effective range of your formations increases to 10 feet. 

Centurion Orders

Starting at 18th level, your years of service and experience have brought you to the rank of Centurion, Giving you the ability to bolster and coordinate your allies through a series of special orders. As an action , you can choose one of the following Centurion Orders to use. You must then finish a short or long rest to use your Centurion Orders again. A creature can only benefit from one Centurion order at a time. 

Orders :-

Renew The Troops: Seeing your enemies quail before you gives your allies courage to fight on. Choose up to six creatures within a 30 foot radius around yourself. Each of these creatures gain temporary hit points equal to your Fighter level + your Constitution modifier. 

Lead by Example: With a snap series of commands, you embolden  your comrades around you. Choose up to six creatures within a 30 foot radius centered around yourself. For 1 minute, whenever those creatures make an attack roll or saving throw, they can add a d4 to the roll provided they can hear and understand you. This effect ends if you are  incapacitated. 

Victory Surge: With a triumphant roar, your allies seize every opportunity and fight like never before. Choose up to six creature with a 30 foot radius centered around yourself. Until the start of your next turn, the chosen creatures can make a single weapon attack as bonus action.