Let me explain something. Not only did all the munitions explode, but all exposed individuals died as well by been literally incinerated. This was done in broad daylight so anyone else could report back what happened.
Recall 100,000 iraqi soldiers did not make it home and we had zero reports of their deaths. These birds toasted them all in the first hour in their forward trenches.
In this instance they came in surprisingly low and that had to be to ensure no doubt over what had happened to the 'encampment' or serrious force in place. This craft can stand of in space and likely do as much damage. It is a huge gravity sled pushed around by jet engines in our athmosphere which is why they are usually seen flying sub sonic.
So yes, it would definately be time to open negotiations and to quite prodding the tail of the dragon. This also explains why we suddenly had a treaty.