Everyone can wear little brown ribbons, and the official mascot can be a braying onager.
From the well.blogs.nytimes.com
Perhaps best known are the ballista, the onager, and the scorpio.
From the en.wikipedia.org
Chariots, pulled by animals like the onager, ox, donkey, and later the horse, originated around 2000 BC.
From the en.wikipedia.org
The onager was the main Roman invention in the field.
From the en.wikipedia.org
The Roman version was called an onager.
From the en.wikipedia.org
The next round included red crowned crane, Persian onager, Bactrian camel and deer, Sable antelope, and white, black and one-horned rhinoceroses.
From the news.enquirer.com
Other animals exhibited at Chester Zoo include Bactrian camel and onager in a large paddock in the centre of the zoo, formerly the zebra exhibit.
From the en.wikipedia.org
The second phase began with onager and ballista fire to cover the approach of the siege towers, which were full of legionaries ready to assault the wall's defenders.
From the en.wikipedia.org
A less accurate weapon like an onager or other single-arm artillery could hit with more force, and thus would be the more useful weapon against reinforced wood or heavy masonry.
From the en.wikipedia.org
More examples
Catapult: an engine that provided medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles
Asiatic wild ass
The Onager (Equus hemionus) is a large member of the genus Equus of the family Equidae (horse family) native to the deserts of Syria, Iran, Pakistan, India, Israel and Tibet. It is sometimes known as the Wild Asian Ass.
The onager was a 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. ...
A wild ass, Equus hemionus, especially the koulan; A military engine acting like a sling, which threw stones from a bag or wooden bucket, and was operated by machinery
A catapult for hurling stones. (See further, artillery.)
Roman name for a Mangonel, literally a "wild ass"
A catapult that used twisted rope to power the launching of projectiles. Differing from the Mangonel in that the end of the throw arm would have a rope and sling. In this sling would be the projectile.
A stone throwing engine introduced by the Romans, but was still used in the early medieval times.