Whether you are in a battle field or a company or among of any kind of group, it is essential the communication system to be considered in your equation. In order to paralyze the enemy, you need to damage the communication. Not the defence, not the resources, the communication. Remember that all kind of processes and work order require communication. It is exactly like you attack the neural system of human body.
In any kind of army, there would be a communication team. And there is for sure second team as plan B to replace the original communication system. Then, you can understand the real importance of communication.
In business, it is no different. Imagine the server, email account, and telephone goes down for any organization!