message: Skirmisher has strength 3 and requires Smelting
diff: <iCityDefense>50</iCityDefense>
  <iHillsDefense>25</iHillsDefense>
  <iCultureGarrison>4</iCultureGarrison>
  - <iAsset>1</iAsset>
  - <iPower>3</iPower>
  + <iAsset>2</iAsset>
  + <iPower>4</iPower>
  <UnitMeshGroups>
  <iGroupSize>3</iGroupSize>
  <fMaxSpeed>1.75</fMaxSpeed>
  <iCollateralDamageMaxUnits>2</iCollateralDamageMaxUnits>
  <iHillsAttack>25</iHillsAttack>
  <iCultureGarrison>3</iCultureGarrison>
  - <iAsset>1</iAsset>
  - <iPower>2</iPower>
  + <iAsset>2</iAsset>
  + <iPower>4</iPower>
  <UnitMeshGroups>
  <iGroupSize>3</iGroupSize>
  <fMaxSpeed>1.75</fMaxSpeed>
  <bUnitAI>1</bUnitAI>
  </UnitAI>
  </UnitAIs>
  - <PrereqTech>TECH_CONTRACT</PrereqTech>
  - <TechTypes>
  - <PrereqTech>TECH_TANNING</PrereqTech>
  - </TechTypes>
  + <PrereqTech>TECH_SMELTING</PrereqTech>
  <iCost>30</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  <bFeatureImpassable>1</bFeatureImpassable>
  </FeatureImpassable>
  </FeatureImpassables>
  - <iCombat>4</iCombat>
  + <iCombat>3</iCombat>
  <iCombatLimit>100</iCombatLimit>
  <iXPValueAttack>4</iXPValueAttack>
  <iXPValueDefense>2</iXPValueDefense>
  <iFirstStrikes>1</iFirstStrikes>
  - <iWithdrawalProb>75</iWithdrawalProb>
  + <iWithdrawalProb>50</iWithdrawalProb>
  <iCollateralDamage>100</iCollateralDamage>
  <iCollateralDamageLimit>25</iCollateralDamageLimit>
  <iCollateralDamageMaxUnits>2</iCollateralDamageMaxUnits>
  <iHillsAttack>25</iHillsAttack>
  <iCultureGarrison>3</iCultureGarrison>
  <iAsset>1</iAsset>
  - <iPower>2</iPower>
  + <iPower>3</iPower>
  <UnitMeshGroups>
  <iGroupSize>3</iGroupSize>
  <fMaxSpeed>1.75</fMaxSpeed>
  