Martial Archetype
War Attaché
The war attaché is a fighter that is specialised in diplomacy and negotiation. These fighters sometimes come from noble birth, other times they are commoners skilled with blade and words.
Envoy
When you become a war attaché, you gain proficiency and expertise with one of the following skills of your choice: Deception, Intimidate, Persuasion.
Momentary Hospice
When you use your second wind feature, you also target one creature within 5 feet of you. That creature becomes charmed by you one of your allies of your choice until the end of your next turn or until the creature takes any damage.
Commanding Presence
Starting at 10th level, you gain a pool of commander dice. You have a number of commander dice equal to half your fighter level (rounded down). Your commander die is a d4. You regain all commander dice when you finish a long rest.
Whenever a creature within 30 feet of you rolls a saving throw or an ability check using Intelligence, Wisdom, or Charisma, you can expend one of your commander dice as a reaction. Roll you commander die and add the result as a bonus or penalty (your choice) to the triggering roll. You can use this ability after having seen the result of the roll, potentially changing the outcome of the roll.
Truce
Beginning at 15th level, you can command a small zone of peace.
As a bonus action, all creatures within 15 feet of you become charmed by all other creatures inside this area (including yourself) for up to 1 minute or until they leave the area. You can maintain this zone until you attack another creature.
Any creature that leaves the area is no longer effected by the charmed condition unless they enter the area again.
You can use this ability once between short and long rests.