The term `Pyrrhic Victory` is used to describe a victory that is achieved at a great cost to the winner. This means that even though the person or group may have technically won, the toll or consequences associated with the victory outweigh the benefits gained.

Option 1 suggests that a Pyrrhic Victory is related to war and the involvement of the Air Force. However, this is not an accurate description of the term. A Pyrrhic Victory can occur in any situation, not just in a war where the Air Force plays a major role.

Option 3 suggests that a Pyrrhic Victory is specific to a political party winning a victory where members of the opposition party have betrayed their own members. This is not the correct definition of a Pyrrhic Victory. The term does not involve deceit or betrayal within a political context.

Option 4 suggests that a Pyrrhic Victory is achieved in games as a result of match-fixing. This is also not an accurate description of the term. A Pyrrhic Victory is not related to cheating or unethical behavior in games or sports.

Therefore, the correct answer is option 2, which states that a Pyrrhic Victory is a victory achieved at a great cost to the winner.