A free mod for Mount & Blade II: Bannerlord, by Cheyron.

How to use the Save Battle Formation mod?

This mod is a collection of various army-related game mechanics. The most important aspect of this mod is the ability to save your army’s positions relative to each other. This allows you to use the saved positions for future battles. This is very useful for you, as you will be able to organize all your troops how you want them to form up relative to each other. You can also use the saved positions for future battles. You can save the positions of all your troops in one battle, or for future use. This is possible by selecting the formation(s) you want to save positions for first then pressing Shift+K (default). This will overwrite any previous saved position for the selected formation.

This is a game-changer in the way you play the game. The way you play the game will change. You can now control all your troops in one battle, or for future use.