Tactics skill

[Legbreaker]

A tactics skill might be used when the player makes a bonehead decision. The GM rolls against the skill, and if it's a success, informs the player of the likely outcome of their planned action. It might also be useful during the planning stages of an engagement - a successful roll means the GM gives the player some additional insight into the enemy's likely reactions to ideas put forward.

A catastrophic failure on the other hand results in the GM giving misinformation, so it's a skill not to be used lightly - all rolls of course would have to be made by the GM in secret.