Could be a Lily Pad. Some of them are basically a whole large base, with almost no people, but all the equipment and supplies needed for a large force. So after delivering several large aircraft full of troops you have a large mechanized force with supplies for a campaign. These are also good for resupplying a nearby force. So you could screw up logistics in the area by destroying it but that might not result in many casualties, if any, due to the skeleton crew.