A child is sent to a prison mining colony on the belt. There is a general at the prison and promotes the child to admiral. The child and general escape and travel the Sol system as a traveling performance. As time goes on more people join the kid, now a man.
The Earth government is under the UN and the police force is called the Peacekeepers. But the government is corrupt and the admiral fight the government with the people that follow him and they call him saint because of how good he is.
The saint wins a lot of battles against the UN and the evil leader of the UN dies from assassination from within; a new leader takes command and offers peace with the saint but that his group must surrender and then they would be pardoned, so the saint does.