With the Han dynasty's imperial expansion to the west, Xinjiang became a frontier region for political negotiation, military conflict, and cultural contact. The recent excavation at Shichengzi military fort has rendered an opportunity to examine animal exploitation in the empire's frontiers. The results of our zooarchaeological analysis suggest that meat production primarily relied on caprines and cattle. Horses, donkeys, and camels were exploited for labor. Pig husbandry was a novel addition to the local agropastoral regime, and pork became a signature food particular to the identity of the garrison community. A “meat‐not‐milk” dietary preference also underscores this cultural identity. Animal exploitation was a combined result of subsistence adaptation and military reinforcement. Our work further highlights the tension between the flexible husbandry strategy adapted to the new environment and the conservative culinary attitude held by immigrants toward certain new foods. This case study helps contextualize the interaction and integration of different ways of life.