While the fort’s surrounding towns became off-limits one after the other, Commander Hardy designed two enclaves directly at the fort’s gate to channel the boredom and anger brewing on the base. At “the Hook,” prostitution was supervised and regulated by the army, and STD control ensured by the hospital’s military team both for soldiers and for prostitutes. And, thanks to investments by Chicago businessmen, the “Greentop” became the largest segregated drinking establishment managed and controlled by the military. Through these two experiments intended to stem “vice,” the army extended its authority into civilian territory.