During the game, I regularly created, added, removed groups, depending on the necessary tasks. In some cases, depending on the enemy, it is necessary to be able to react quickly, withdraw weak forces, and transfer strong ones. This is important to save UNWASHED PEASANTS
Most often, the fight looked like a mixed attack of OFFICERS and ELITEs in the first stage, and the addition of UNWASHED PEASANTS in the middle of the battle (and the withdrawal of ELITEs from the battle). When the UNWASHED got involved in a fight, the battle was already coming to an end, and they easily finished the remnants of the enemy, earning experience.
This is just one of the examples, there are many others that allow for the most flexible possibilities.
This is a bad, bad update. You must fix it