There was a great feature added recently, allowing one to Send all Support home, with a single function after accessing External Troops Defending at one's own castle.
I would appreciate this same feature being made available when accessing External Troops Defending one someone else's castle.
I just finished Recalling Support, sent from 80 of my castles, to an ally, now believed to be inactive. Having the similar feature, described above, would have been a great benefit.