From atop the earthen rampart that protects their village, these defenders are barraging a ravenous blademaw with volleys of boulders.
I imagine this scene takes place in a later time period in the setting’s history than some of my other prehistoric-fantasy illustrations. During this era, some of the human cultures would have developed agriculture and metallurgy after settling down in permanent villages. It would roughly correspond to the Neolithic to Copper Age of our own world’s history, or perhaps the early Iron Age in western Africa.