The Ghost Squadron8 books in series
Age of Expansion: A Kurtherian Gambit Series Publisher's Summary
After 10 years of wandering the outer rim of the galaxy, Eddie Teach is a man without a purpose. He was one of the toughest pilots in the Federation, but now he's just a regular guy, getting into bar fights and making a difference wherever he can. It's not the same as flying a ship and saving colonies, but it'll have to do.
That is, until General Lance Reynolds tracks Eddie down and offers him a job. There are bad people out there, plotting terrible things, killing innocent people, and destroying entire colonies.