Salients, re-entrants and pockets

Imagine you have a big piece of land that is a little bit wavy. Some parts of the land stick out a lot and look like little hills, while others dip down and look like little valleys. These hills sticking out are called salients, and the valleys dipping in are called re-entrants.

When you look at the land, you might notice that there are some areas where the hills and valleys make little spots that are kind of hidden or tucked away. These spots are called pockets. It's like if you had a big blanket and you made little folds in it to create little secret hiding spots.

Now imagine if you were a soldier trying to move across this land. If you were walking along the top of a salient, you might be more exposed and easier to spot by the enemy. But if you were walking in a re-entrant or hiding in a pocket, you might be more protected and hidden.

So knowing about the salients, re-entrants, and pockets on a piece of land can be important for soldiers trying to move across it in a strategic way.