Quote Originally Posted by Ranika
The Roman invasion of Britain began in 43 AD, after the game ends (this discludes Caesar's previous invasions in 55 and 54 BC). Just saying the Roman's had the repeating ballista isn't enough, I believe most of the team who commented on it were fully aware of its existence, but believe it to be out of our period. Do you have a time frame for the creation of the repeating ballista?
http://www.mlahanas.de/Greeks/RepCatapult.htm

that's mid C3 BC