i think that you should do this if you have two cities and your city i goona get took reinforce you other city with all your troops,rescources then leave it once your rescources have been sent.but i think itd be so funny if you wait till the lat second to abandon so they send all these troops and a levle 10 npc appears TO LATE TO RECALL ahhhhhhhhhhhhhhhhh there troops dead
theyll be like and youll be like warrior