That would be a nice ability to have to rally all near by units and have them march in formation many mods do have formation however they do fail to have the units march within formation. I feel as if when you can have your units march within formation it would take away the cavalries natural advantage against Nords and etc. Cause it would allow you to utilize the strategic game-play to the maximan potential.
Wedge-for cavalries and make it so cav's can't hold this position while marching unless they go below couch speed.
Square-for infantry allow to march in square formation for players who are safe guarding a special unit aka bard/player's child/ or monk.
Rectangle-Specialized for open cavalry charge or for holding position for the ranged units.
IE Swadian Knights, Vaegir Marksmen and etc.
Wedge-for cavalries and make it so cav's can't hold this position while marching unless they go below couch speed.
Square-for infantry allow to march in square formation for players who are safe guarding a special unit aka bard/player's child/ or monk.
Rectangle-Specialized for open cavalry charge or for holding position for the ranged units.
IE Swadian Knights, Vaegir Marksmen and etc.