Determines if Ore Miners are immune to normal combat damage during the game (thus indestructible) although a bug in the game engine sometimes renders them susceptible to weapons with high AmbientDamage= values attached. Although parsed and valid, this is de-supported in Red Alert 2. In Red Alert 2, this may have had the effect of modifying all warheads in the game so that they had a Verses= of 0% against medium armor, as only Ore Miners have this type of armor, thus it may still be possible to implement this.
