https://arstechnica.com/information-technology/2021/01/connected-battlespace-1/

Since the earliest days of warfare, commanders of forces in the field have sought greater awareness and control of what is now commonly referred to as the "battlespace"—a fancy word for all of the elements and conditions that shape and contribute to a conflict with an adversary, and all of the types of military power that can be brought to bear to achieve their objectives.

The clearer a picture military decision-makers have of the entire battlspace, the more well-informed their tactical and strategic decisions should be. Bringing computers into the mix in the 20th century meant a whole new set of challenges and opportunities, too. The ability of computers to sort through enormous piles of data to identify trends that aren't obvious to people (something often referred to as "big data") didn't just open up new ways for commanders to get a view of the "big picture"—it let commanders see that picture closer and closer to real-time, too.