How to install defensive barrier

How to install defensive barrier?

1. When you receive the defensive barrier/bastion, they are packed like this.
   
   

2. Extend the defensive barrier to the design length.
   

   
   
   

3. Fill each grid with soil or sand.
   
   
   

4. Compact the contents to make it firm.
   
   
   

5. Set up more barriers according to site requirements.