Keago is charged with seven charges of violating articles of the Uniform Code of Military Justice, including sexual assault.
In addition to the base closure, the petition calls for an end to the culture of sexual assault and sexual harassment.
the Army announced a probe into the local program intended to respond to and prevent sexual assault.
The report concluded that training efforts have encouraged soldiers to report problems.
McSally, a retired colonel and former A-10 Warthog pilot, writes about multiple incidents of sexual abuse in her book.
The court-martial, scheduled for May after several delays, was postponed earlier this month for coronavirus concerns.
Dr. John Giacomini is accused of sexually assaulting another doctor in his department.
Wisconsin National Guard spokesman Joe Trovato said the Guard takes reprisal complaints seriously.
Third Class Midshipman Nixon Keago was charged in October.
Reports of sexual assault and sexual harassment continue to rise in the U.S. military.