Reaper would have been my suggestion as well: their halfllings and gnomes include some great options now, with the recent Bones 6 Kickstarter adding some more great gnomes and haflings to start appearing in a couple years. The "child adventurers" that appeared in the Bones 5 Kickstarter (iirc) make great halflings or gnomes as well, since Reaper's halflings and gnomes have somewhat child-like appearances and proportions already.
Seems like in the liteature, halfling men weren't particularly inclined toward adventure or warfare, and halfling women even less so, but something tells me that, forced to defend their homes and gardens, halfling women and men alike can give as good as they get and could be fierce warriors when pushed into it. I wouldn't want to be the hapless goblins that stick their arms into the hornet's nest of a well-motivated and prepared halfling shire's militia!
I kinda imagine that a halfling army doesn't get a lot of respect on a "proper" battlefield, but halfling guerillas, resistance fighters, and partisans, including halfling women, would be capable of striking sheer terror into the hearts of overconfident and unsuspecting conquerors and occupiers....
