Now thats bravery for you !!
Also in Caesar's recounts of the Civil War, a Titus Puleio was responsible for the 'betrayal of the Army of Gaius Antonius" (Mark Antony's younger brother).
Possibly the same person? Vorenus, is not listed.
Wiki claims that Pullo fought for Pompey in the Civil Wars and turned some of Caesars men over to fight for Pompey. I don't believe this us true (unless I find a credible source for this). That would of sucked :-/
We all know how bad Wiki can be though...
I quite like how HBO portayed Pullo and Vorenus, it made the series quite amazing to watch and wish it never ended.