Roman siege engines BC, and surrounded by Roman fortifications. As was standard siege technique at the time, "ballistae" were placed up in the towers with other soldiers armed with either bows or slings. The onager was a post-classical Roman siege engine, which derived its name from the kicking action of the machine, similar to that of an onager (wild ass). It is a type of catapult that uses torsional pressure, generally from twisted rope, to store energy for the shot. The onager consisted of a frame placed on the ground to whose front end a vertical frame of solid timber was rigidly fixed;
Emotional support animal the person needs. Being attached to an animal can help relieve loneliness and can help a person's well being. There are no requirements for training emotional support animals. Emotional support animals typically have no training beyond what would be expected for the same type of pet. Emotional support animals perform no tasks other than what a pet of the same type would do – including unwanted behaviors, such as defecating in inappropriate places, growling and barking at people, or biting them. Both poorly trained emotional support animals and poorly trained pets that are being fraudulently passed off as emotional support