HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

actually, I came up with a useful feature for the general transfer buttons: select a stack with a click, click the button - a single unit remains in the selected stack, and the rest of the army is transferred. this is a keyboard-free transfer method with the option to select a single unit. I, as a non-competitive player, like this. And I will definitely remove the "intelligence" of leaving a single unit - I'll make it leave the weakest unit without selecting anything.