The general feigned a retreat to lure the enemy deep in.
Tips
register
佯 is a formal/literary word. In everyday spoken Chinese, people use 假装 (jiǎzhuāng — to pretend) instead. 佯 appears often in classical texts, historical dramas, and formal writing.
memory
佯 = 人 (person) + 羊 (sheep). Think of a wolf in sheep's clothing — a person acting like a sheep, pretending to be something they're not.