Jacob can use a bonus action and expend a superiority die to direct an ally to strike, letting that ally use its reaction to make a weapon attack and add the die to the damage roll.

You have a limited well of stamina you can draw on to keep yourself in the fight. As a bonus action, you regain 1d10 + 6 hit points. Once you use this feature, you must finish a short or long rest before you can use it again.

You can push yourself beyond your normal limits for a moment. On your turn, you can take one additional action on top of your regular action and a possible bonus action. Once you use this feature, you must finish a short or long rest before you can use it again.

When Jacob uses the Attack action, he can attack twice instead of once.

Jacob can spend a superiority die to add it to a damage roll and attempt to knock the target prone.

When a creature misses Jacob with a melee attack, he can use his reaction to make a melee weapon attack against that creature.

While wearing armor, you gain a +1 bonus to AC.

You learn to lead and control the flow of battle through tactical mastery. You have 4 superiority dice, which are d8s. You know the maneuvers Trip Attack, Riposte, and Commander's Strike. Your maneuver save DC is 16. You can spend a superiority die to fuel one of your maneuvers, and you regain all expended dice when you finish a short or long rest.

You gain proficiency with one type of artisan's tools of your choice. Jacob is most often given proficiency with smith's tools or carpenter's tools to reflect field repairs and siege work.

You have chosen the Battle Master martial archetype, a disciplined combatant who turns battlefield training into precise, decisive strikes.

You have increased one ability score by 2 or two ability scores by 1 each. Jacob used this improvement to sharpen the strength he relies on in the shield wall.

You have learned to read the habits and competence of nearby creatures through experience and instinct. Over the course of 1 minute, you can assess a creature's capabilities compared to your own. This is not perfect knowledge, but it is enough to judge danger, training, and whether an opponent is likely to break first.

You have increased one ability score by 2 or two ability scores by 1 each. Jacob used this improvement to harden his body and sharpen his staying power.

Because of your military service, you can usually secure shelter, food, and protection from other soldiers or those sympathetic to your rank. You can also find officers or veterans who recognize your rank and are willing to help you.