Okay, so let's say you're playing a game with your friends, but it's not just any game - it's a really big and complicated game that involves people pretending to be in a battle. And in this game, you need to be able to talk to your friends and tell them what to do. But how do you do that if there are so many things going on at the same time?
That's where "battle management language" comes in. It's like a special code that helps you communicate with your friends quickly and easily, without getting confused. It's kind of like a secret language that only people playing the game know how to speak.
So instead of saying long things like "run to the left and hide behind that tree," you can just say a few simple words like "go left, tree." And everyone playing the game knows exactly what you mean.
This language helps everyone work together to win the game and have fun. It's something that real soldiers use too, but they use it to talk about real battles, not just pretend ones.