Which Commandant was court-martialed?

The answer is correct because Lieutenant Colonel Anthony Gale was indeed court-martialed. As a high-ranking officer, he faced legal proceedings due to actions that were deemed inappropriate and contrary to military conduct. This event is notable in Marine Corps history as it underscored the standards of behavior expected from those in command and the accountability that comes with leadership roles in the military.

Other options presented, such as General Charles Krulak, General James Conway, and Colonel William Pendleton, did not face court-martial during their careers. Instead, they are recognized for their contributions to the Marine Corps and have not been involved in legal controversies that warranted such severe actions. Each of these officers maintained a level of integrity and leadership that upheld the values of the Marine Corps throughout their service.