What if Vercingetorix had won the Battle of Alesia? How might it have affected history?
Pompey or Crassus,
Crassus had been dead for a year or so.
Pompey might actually go for it, depending on what his relationship with Caesar is at the moment.
I would add that in the event of a strong gallic victory, there'd be many standards taken. Gaul would then be a target for any glory seeking Roman general looking to make a name for himselfCaesar roman army would get massacred, and Roman conquest of Gaul would be delayed several years (decades if Gaul lucky). In end, other glory-seeking Roman general, perhaps even Pompey or Crassus, would march again to Gaul, eventually someone would succeed. For all weakness in Roman government, Gaul at that time divided into numerous tribes, many which allied to Romans. Vercingetorix is war leader of allied tribes, when he victorious, opposition would soon arise, and Gaul would break-up again.