text: --Update Pre-existing UUs
  INSERT INTO Unit_ClassUpgrades(UnitType, UnitClassType)
  	SELECT UnitType, "UNITCLASS_SEALTEAM" FROM Civilization_UnitClassOverrides WHERE UnitClassType = "UNITCLASS_MARINE"
  	
  --Create a trigger to update UUs added after this mod.
  CREATE TRIGGER CivUpdateMarineReplacements AFTER INSERT ON Civilization_UnitClassOverrides WHEN NEW.UnitClassType = "UNITCLASS_MARINE" BEGIN
      INSERT INTO Unit_ClassUpgrades(UnitType, UnitClassType) VALUES(NEW.UnitType, "UNITCLASS_SEALTEAM");
      END;
  