message: Crossbowman has +25% city defense +25% hills defense
diff: <iXPValueAttack>4</iXPValueAttack>
  <iXPValueDefense>2</iXPValueDefense>
  <iFirstStrikes>1</iFirstStrikes>
  - <UnitCombatMods>
  - <UnitCombatMod>
  - <UnitCombatType>UNITCOMBAT_MELEE</UnitCombatType>
  - <iUnitCombatMod>50</iUnitCombatMod>
  - </UnitCombatMod>
  - </UnitCombatMods>
  + <iCityDefense>25</iCityDefense>
  + <iHillsDefense>25</iHillsDefense>
  <iCultureGarrison>6</iCultureGarrison>
  <iAsset>2</iAsset>
  <iPower>7</iPower>
  <bUnitAI>1</bUnitAI>
  </UnitAI>
  </UnitAIs>
  - <PrereqTech>TECH_MACHINERY</PrereqTech>
  + <PrereqTech>TECH_ARTISANRY</PrereqTech>
  <BonusType>BONUS_IRON</BonusType>
  <iCost>50</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iXPValueAttack>4</iXPValueAttack>
  <iXPValueDefense>2</iXPValueDefense>
  <iFirstStrikes>2</iFirstStrikes>
  + <iCityDefense>25</iCityDefense>
  + <iHillsDefense>25</iHillsDefense>
  <iCollateralDamage>50</iCollateralDamage>
  <iCollateralDamageLimit>60</iCollateralDamageLimit>
  <iCollateralDamageMaxUnits>5</iCollateralDamageMaxUnits>
  