Army Unit

Commanding. If the unit has no acting commander, a friendly creature of size no more than one size above the largest individual in the unit can become its commander as a free action. The commander can stop being the commander by spending an Action to announce their stepping down from position. The commander has full control of the unit before or after their turn. A unit cannot act like it's its turn more than once per round. Traits, abilities, skills, actions, bonus actions, and reactions with the "[Commander]" tag before their name are such that the unit can perform or has only when it has an active commander.

HP loss. The unit's HP equals the number of individuals in the unit except their commander. The unit loses X HP (and thus individuals) for every Y damage taken.

Attacking. The unit can attack all creatures and units within the range of its attacks but its damage is divided by the number of targets.

Mass Damage Susceptibility. The unit automatically fails all saving throws against spells, magical effects and abilities that do massive damage. It has no Resistance against this damage.

Sole Mass Damage Target. The unit must be targeted and be the only target of a mass damage effect to be affected by it.

Unit "Death". The unit disbands into individual creatures if it reaches 5 HP or lower.

[Commander] Movement. Moves with the speed of the slowest individual in the unit divided by two.

[Commander] Bonus. The unit gains a bonus from their commander that is specific to the commander.

[Commander] Defend Leader. The unit's commander automatically succeeds on saves against mass damage and has resistance to mass damage. Any attacks specifically against the commander are made with disadvantage. Attacks against the unit do not affect the commander

[Commander] Leader Attack. The commander of the unit can attack normally, using the edges of the unit to determine the start of their range.

Attack. Specific to the particular unit. Would usually deal an amount and type of damage depending on the number and kind of individuals in the unit.

[Commander] Merge. Move individuals from this unit to an adjacent friendly unit.

[Commander] Attack of Opportunity. The commander can usher the unit to attack an enemy unit that is moving more than 5 ft. away from this unit OR if an enemy unit had its turn and didn't attack this unit.