Comprehensive training and well-established tactics are the trademark qualities of a solid and robust military training program designed to win wars. As a result, well-trained soldiers can think and act soundly while engaged in warfare. Like soldiers, Christians must similarly train to become prepared to make biblically-sound choices while engaged in spiritual warfare--specifically, deception. Deception, as clearly conveyed in the Bible, is Satan's weapon of choice, therefore, if understood properly, can be thwarted effectively. Defying Deception: A Field Guide to Understanding and Countering Satan's Strategy of Deception is a book for those who want to raise their awareness of the enemy's strategies and to mature their spiritual walk by offsetting the enemy's deceptive methods with practical means. That said, this field guide establishes a parallel between Satan's deceptive tactics and military Psychological Operations (PSYOP), operations to convey false information to influence emotions, motives, and reasoning because both seek to lead people into falsehood to influence decision-making in a destructive way. This field guide discusses Satan's deceptive strategy within the context of PSYOP. Armed with this information, practical defensive strategies are developed using well-established, effective military tactics to assist readers in overcoming spiritual deception.