Let assume that someone has spare time and like play with a opponent also random.
Has no time to arrange a battle,he want play at once.
He start a balance battle in Solo Mode Both side, make deploy and upload sav file on depot rename sav file how sideA_name_of_battle_time (example french_waterloo_815) and wait the someone download the file play for 15 minutes and upload the file how(allied_waterloo_830) and so on.
The first that download the file just uploaded play.
This special slot on depot work that when upload a file the previous is cancelled.
It is only a funny idea,not very good but from a idea can be born something of better.