" 

 :That's an extremely generous offer; thank you!  I obviously don't want to force you into working on military history if you'd rather be editing something else; but if you don't mind, I could certainly use your help. 
 :As far as what's more important: our coverage of both Mongol and Roman military history is pretty sparse (most of the Roman battles, except for a few from the Second Punic War, are merely stubs).  I would suggest getting the Mongol articles fleshed out first—there are very few other Wikipedians working in that field—and then moving on to the various Roman articles as time permits.  The order in which you might approach the various articles in these areas is entirely up to you; given that both of them are rather outside my particular area of interest, you'll be in a better position to evaluate which events are more important.  —s "