Dragoons are powerful physical attackers, they tend to wear armor meant to invoke the imagery of dragons, including helmets shaped like a dragon's head, spikes, and wing and scale designs.

Restriction: Knighthood

Dragoons tend to be directly tied to a knighthood of some capacity, this is optional.

Dragon's breath

When you reach third level you are imbued with the fire breath of a dragon

As an action you can use your action to exhale destructive energy. When you use your Dragon's Breath, each creature in a 15 ft cone must make a dexterity saving throw. The DC for this saving throw equals 8 + your Constitution modifier + your proficiency bonus. A creature takes 2d8 damage on a failed save, and half as much damage on a successful one. The damage increases to 3d8 at 6th level, 4d8 at 11th level, and 5d8 at 16th level. You may use this an amount of times equal to your  proficiency bonus, it recharges on a short or long rest

Dragon Launch

When you choose this archetype at 3rd level, you learn how to manipulate wind to launch you into the air and perform a powerful attack.

As an action you launch yourself up to 60 ft into the air, moving a maximum of 15 ft horizontally, you then fall that amount, taking falling damage equal to how ever high you go, typically 1d10 per 10 ft but this is up to your DM, any enemies within 5 ft of where you land must make  a dexterity saving throw with a dc equal to  8 + your Constitution modifier + your proficiency bonus, on a failure they take damage equal to they amount you took and are pushed back 10 ft, on a success they take half damage and are not pushed.

Dragon Surge

Starting at 10th level, when you use your Action Surge feature, you can choose two creatures within 60 feet of you that is allied with you. Those creatures can make one melee or ranged weapon attack with its reaction, provided that they can see or hear you.

Starting at 18th level, you can choose three allies within 60 feet of you, rather than two.

Dragon Sword

Beginning at 15th level, you can extend the energy of the dragon to a melee weapon you are holding. When you make a melee weapon attack you may choose to imbue your weapon with fire before you roll to attack. On a hit the target takes an extra 7d10 fire damage, as well you regain health equal to the damage you do to the target. This can be done 3 times but then cannot be used again before a short or long rest.

Dragoon Laucher

Having perfected the form of the Dragon Launch, you may now move 120 ft vertically and 40 ft horizontally, as well 3 times per long rest you may negate the damage from the fall