Originally Posted by ObadiahtheSlim
It was Unaroyal's turn. The parlay was during the end of Gobwin Knob's turn. Then on Unaroyal's turn the Queen promoted all the garrison units to full dispatched them outside the city and finally disbanded/croaked herself. She couldn't have done that on GK's turn.
Furthermore, as noted here:
The Queen had to deplete the treasury beforehand, or it would be captured along with the city.
And as noted here:
Field units disband/disappear, but city Garrison forces freeze in time, and are thus susceptible to capture (along with any other resources belonging to the city). Thus, by first depleting the treasury and then using it to deplete the Garrison, the Queen double-denied GW's side.