09e4cafc_tions___Crusader_Kings_II_Wiki__Requirement
[Ambition] Become Marshal [Success Condition] Is Marshal [Success Effect] Gain 1.00 Martial Opinion towards liege changed by +15 [Requirement] 
Over 16 years old Not a prisoner Not a councillor Not independent Not female Not incapable
Ambitions - Crusader Kings II Wiki
Requirement