A construction soldier is an infantry unit produced in the barracks. It's primary purpose is making construction yards from which one can build an entirely new base.
The construction soldier is used to move into any place on the map and once deployed, lets the player able to build in the area. It's very advisable that he be heavily protected by other units, as he has only 10 health.
This unit was originally made in the Classic Conquerors by HatHelper