Okay kiddo, so the U.S. military has a special way of sending out people or equipment to gather information about what's happening in a certain area. This is called reconnaissance.
When they send these special people or equipment out, they have a set of rules they follow called military doctrine. It's like a set of instructions to make sure everyone stays safe and gets the job done right.
First, they decide what kind of reconnaissance they need to do. They might want to know about the enemy's location, how many of them there are, or what kind of weapons they have. Once they decide what they need to know, they choose the best person or equipment for the job.
Next, they plan out how they will do the reconnaissance. They might decide to use planes to take pictures from above, or they might send a team of people on foot to sneak around and get a closer look.
They also think about how to stay safe while doing the reconnaissance. They might send out a small group of people to check out the area first, and make sure it's safe for everyone else to go. They also make sure they have the right kind of equipment to protect themselves if things get dangerous.
Finally, when they are done with the reconnaissance, they gather all the information they learned and use it to make plans for how to move forward. It helps them make better decisions about what to do next, and it keeps everyone safer by making sure they have all the information they need.
So, in short, military doctrine for reconnaissance is a set of rules and instructions for safely gathering information about the enemy. It helps the military make better decisions and stay safe while they do their important work.