Answer:
The eight of us go forth not back to protect our king from a foe's attack. What are we?
What loses its head in the morning but gets it back at night?
What gets bigger when more is taken away?
Send poorly behaved children to me and let them sit here. What am I?
I am a certain five-letter word and become shorter when you add two letters to me. What am I?
The answer I give is yes, but what I mean is no. What was the question?