Okay kiddo, so Poland is a big country with lots of soldiers in it. To help them work together better, they divide the country up into smaller parts called military districts.
Think of it like a cake! If you have a big cake, it's easier to cut it into smaller pieces so everyone can enjoy it. Military districts are like those smaller pieces of cake.
Each district has its own group of soldiers and commanders who work together to keep Poland safe. They have different jobs, like some focus on protecting the coast and others focus on defending the cities.
It's like when you and your friends play a game outside – some of you might guard the base while others try to capture the flag. Each person has a different job but you work together to have fun.
So military districts help Poland's soldiers work together better, protect the country, and keep everyone safe.