I have sent my hero and 4 braves and 4 hunters to the Oppositon Hideout, but the attack flag is not available and in the upper right corner where it says units. My 4 braves and 4 hunters do not appear. I send my hero to kill the Dendrogs, but he dies because he is alone. Then I saw that my units automatically went back to my world. I did not send them back.
I resurrectd my hero and tried it again, but the same thing happened.