message: Cavalry: strength 14, +20% open terrain strength
diff: <bFeatureImpassable>1</bFeatureImpassable>
  </FeatureImpassable>
  </FeatureImpassables>
  - <iCombat>12</iCombat>
  + <iCombat>14</iCombat>
  <iCombatLimit>100</iCombatLimit>
  <iXPValueAttack>4</iXPValueAttack>
  <iXPValueDefense>2</iXPValueDefense>
  <iWithdrawalProb>30</iWithdrawalProb>
  <iCollateralDamageLimit>100</iCollateralDamageLimit>
  <iCollateralDamageMaxUnits>6</iCollateralDamageMaxUnits>
  - <iPlainsAttack>25</iPlainsAttack>
  - <iPlainsDefense>25</iPlainsDefense>
  + <iPlainsAttack>20</iPlainsAttack>
  + <iPlainsDefense>20</iPlainsDefense>
  <UnitClassAttackMods>
  <UnitClassAttackMod>
  <UnitClassType>UNITCLASS_ARTILLERY</UnitClassType>
  <bFeatureImpassable>1</bFeatureImpassable>
  </FeatureImpassable>
  </FeatureImpassables>
  - <iCombat>12</iCombat>
  + <iCombat>14</iCombat>
  <iCombatLimit>100</iCombatLimit>
  <iXPValueAttack>4</iXPValueAttack>
  <iXPValueDefense>2</iXPValueDefense>
  <iWithdrawalProb>30</iWithdrawalProb>
  <iCollateralDamageLimit>100</iCollateralDamageLimit>
  <iCollateralDamageMaxUnits>6</iCollateralDamageMaxUnits>
  - <iPlainsAttack>50</iPlainsAttack>
  - <iPlainsDefense>50</iPlainsDefense>
  + <iPlainsAttack>20</iPlainsAttack>
  + <iPlainsDefense>20</iPlainsDefense>
  <UnitClassAttackMods>
  <UnitClassAttackMod>
  <UnitClassType>UNITCLASS_ARTILLERY</UnitClassType>
  