Stark's Command (book 2) by Jack Campbell

Sergeant Ethan Stark is placed in command of the US military forces that have overthrown their high-ranking officers. Instead of issuing orders, Stark confides his hope of forging an army based on mutual respect. Now, in addition to fighting a merciless enemy on the moon's surface, Stark must contend with the US government's reaction to his mutiny.
Binding: Paperback / softback