message: Marine: reduce bonus against Machine Gun and Howitzer to 25%
diff: <UnitClassAttackMods>
  <UnitClassAttackMod>
  <UnitClassType>UNITCLASS_MACHINE_GUN</UnitClassType>
  - <iUnitClassMod>50</iUnitClassMod>
  + <iUnitClassMod>25</iUnitClassMod>
  </UnitClassAttackMod>
  <UnitClassAttackMod>
  <UnitClassType>UNITCLASS_HOWITZER</UnitClassType>
  - <iUnitClassMod>50</iUnitClassMod>
  + <iUnitClassMod>25</iUnitClassMod>
  </UnitClassAttackMod>
  </UnitClassAttackMods>
  <iConscription>1</iConscription>
  