Check this out from Shadowline Web Comics: Hannibal Goes To Rome by Brendan Mc Ginley and Mauro Vargas. Its a condensed history of the Punic Wars. The concept (history in comic form, the art) reminds me of Larry Gonick's Cartoon History of the Universe series and that's not a bad thing at all. It's quite funny and well written.
If you like ancient history particularly ancient Roman history or ever played Rome: Total War on the PC, you should check out this webcomic. The strip isn't finished yet (Hannibal has just arrived at the Alps at the time I'm writing this) so look forward to more mad Carthaginian rampage on Roman legionnaires in the days to come.