Starcom: The U.S. Space Force S01E08 - Dark Harvest

The Verdugo Commune, a successful and peaceful farming community is besieged over and over again by mercenary raiders who consider these people ripe for the picking since they are passive and do not fight back. Slim, Dash, and Crowbar chase them away for the moment, but are told to leave by the elders who dislike fighting violence with violence. Our guys still try to help, though, but the people, with Dash's lead, defend themselves by using the gigantic mirrors in their valley to blind and confuse the raiders.