message: Horseman: strength 6, no open terrain modifier, -25% city strength
diff: <bFeatureImpassable>1</bFeatureImpassable>
  </FeatureImpassable>
  </FeatureImpassables>
  - <iCombat>5</iCombat>
  + <iCombat>6</iCombat>
  <iCombatLimit>100</iCombatLimit>
  <iXPValueAttack>4</iXPValueAttack>
  <iXPValueDefense>2</iXPValueDefense>
  + <iCityAttack>-25</iCityAttack>
  + <iCityDefense>-25</iCityDefense>
  <iWithdrawalProb>20</iWithdrawalProb>
  <iCollateralDamageLimit>100</iCollateralDamageLimit>
  <iCollateralDamageMaxUnits>3</iCollateralDamageMaxUnits>
  - <iPlainsAttack>25</iPlainsAttack>
  <UnitCombatMods>
  <UnitCombatMod>
  <UnitCombatType>UNITCOMBAT_SIEGE</UnitCombatType>
  <bFeatureImpassable>1</bFeatureImpassable>
  </FeatureImpassable>
  </FeatureImpassables>
  - <iCombat>5</iCombat>
  + <iCombat>6</iCombat>
  <iCombatLimit>100</iCombatLimit>
  <iXPValueAttack>4</iXPValueAttack>
  <iXPValueDefense>2</iXPValueDefense>
  + <iCityAttack>-25</iCityAttack>
  + <iCityDefense>-25</iCityDefense>
  <iWithdrawalProb>20</iWithdrawalProb>
  <iCollateralDamageLimit>100</iCollateralDamageLimit>
  <iCollateralDamageMaxUnits>3</iCollateralDamageMaxUnits>
  - <iPlainsAttack>25</iPlainsAttack>
  <UnitCombatMods>
  <UnitCombatMod>
  <UnitCombatType>UNITCOMBAT_MELEE</UnitCombatType>
  <bFeatureImpassable>1</bFeatureImpassable>
  </FeatureImpassable>
  </FeatureImpassables>
  - <iCombat>5</iCombat>
  + <iCombat>6</iCombat>
  <iCombatLimit>100</iCombatLimit>
  <iXPValueAttack>4</iXPValueAttack>
  <iXPValueDefense>2</iXPValueDefense>
  + <iCityAttack>-25</iCityAttack>
  + <iCityDefense>-25</iCityDefense>
  <iWithdrawalProb>20</iWithdrawalProb>
  <iCollateralDamageLimit>100</iCollateralDamageLimit>
  <iCollateralDamageMaxUnits>3</iCollateralDamageMaxUnits>
  - <iPlainsAttack>25</iPlainsAttack>
  <UnitCombatMods>
  <UnitCombatMod>
  <UnitCombatType>UNITCOMBAT_SIEGE</UnitCombatType>
  