Border security wall construction

Comply with a contract on border security wall construction. "Use various machinery during the construction." It's like being a real constructor in this game. The enemy army is at the border. The defense wall was destroyed by enemy shelling. The wall needs to be recovered as quickly as possible to stop the invaders. To clear the construction ground, get into a bulldozer. Carry things in a truck. Use a mixer. Set one block onto another.