An Army marches on it's stomach. That's not very far if you set the baggage train on fire.

Having large numbers of apex-ish predators supporting an army is not usually a good thing, but if you keep the force fairly small it's not as much of a problem.

What you have is an animal almost designed for savaging pack animals and the baggage train though.

First, they can fly. Swoop in and scare the heck out of oxen and pack mules. Maybe eat them. At any rate, that's going to slow stuff down. Couple that with the ability to set the actual food on fire. Soldiers get cranky when there is nothing to eat.

So that's their role. If they fly in at night, terrorize or kill the pack animals and set the supplies on fire you do a lot of damage without ever crossing swords, and it's long term damage that is very hard to recover from. Start from the back of the baggage train and work forward, reducing reinforcement potential. If they start to throw up nets so the fliers can't get close you still have a breath weapon.

These guys are also good for ambushes. Pile a logjam in a canyon choke point. Set of some flammable stuff in places that can be dropped in behind the incoming army. Dragons ignite the the stuff falling in the behind. That should spook any animals. Then set the stuff at the blockage on fire. Archers pick off those trying to climb out, milling panicked animals account for a bunch more. Sounds like a bad place to be...

An Army marches on its stomach. That's not very far if you set the baggage train on fire.

Having large numbers of apex-ish predators supporting an army is not usually a good thing, but if you keep the force fairly small, it's not as much of a problem.

What you have is an animal almost designed for savaging pack animals and the baggage train though.

First, they can fly. Swoop in and scare the heck out of oxen and pack mules. Maybe eat them. At any rate, that's going to slow stuff down. Couple that with the ability to set the actual food on fire. Soldiers get cranky when there is nothing to eat.

So that's their role. If they fly in at night, terrorize or kill the pack animals and set the supplies on fire you do a lot of damage without ever crossing swords, and it's long term damage that is very hard to recover from. Start from the back of the baggage train and work forward, reducing reinforcement potential. If they start to throw up nets so the fliers can't get close, you still have a breath weapon.

These guys are also good for ambushes. Pile a logjam in a canyon choke point. Set of some flammable stuff in places that can be dropped in behind the incoming army. Dragons ignite the the stuff falling in the behind. That should spook any animals. Then set the stuff at the blockage on fire. Archers pick off those trying to climb out, milling panicked animals account for a bunch more. Sounds like a bad place to be...