Allied units not notified about escape
When units from a stack that has units of multiple (allied) players escape, the notification about escape is sent to the owner of the unit that actively defended, not to (all) owners of the escaped units.
Not true, at least any more. Losses and escapes are counter per player, and all are informed.
When units from a stack that has units of multiple (allied) players escape, the notification about escape is sent to the owner of the unit that actively defended, not to (all) owners of the escaped units.