Boar Mounted Hobgoblin Captain

Martial Advantage. Once per turn, the hobgoblin can deal an extra 7 (2d6) damage to a creature it hits with a weapon attack if that creature is within 5 feet of an ally of the hobgoblin that isn’t incapacitated.

Charge. If the boar moves at least 20 feet straight toward a target and then hits it with a tusk attack on the same turn, the target takes an extra 7 (2d6) slashing damage. If the target is a creature, it must succeed on a DC 13 Strength saving throw or be knocked prone.

Relentless (Recharges after a Short or Long Rest).
If the boar takes 10 damage or less that would reduce it to 0 hit points, it is reduced to 1 hit point instead.

Multiattack. The one from the hobgoblin one from the boar.

Hobgoblin
Greatsword. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 9 (2d6 + 2) slashing damage.
Javelin. Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or range 30/120 ft., one target. Hit: 5 (1d6 + 3) piercing damage.
Leadership (Recharges after a Short or Long Rest). For 1 minute, the hobgoblin can utter a special command or warning whenever a nonhostile creature that it can see within 30 feet of it makes an attack roll or a saving throw. The creature can add a d4 to its roll provided it can hear and understand the hobgoblin. A creature can benefit from only one Leadership die at a time. This effect ends if the hobgoblin is incapacitated.

Boar

Tusk. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) slashing damage.