Honor Harrington novels. Saganami Island

Rear Admiral Michelle Henke was commanding one of the ships in a force led by Honor Harrington in an all-out space battle when she and her surviving crew were taken prisoner. Through an agreement with the Havenites and her government, she was given a command far away from the war's battle lines. What she didn't realize was that she would find herself on a collision course with the interstellar syndicate of criminals known as Manpower.

"The Mesan Alignment has a plan--one it's been working on for centuries. A plan to remake the galaxy and genetically improve the human race--its way. Until recently, things have gone pretty much as scheduled but then the Alignment hit two bumps in the road: one called the Star Empire of Manticore, the other named Honor Harrington. In order to undercut Manticore's galaxy-wide reputation as a star nation of its word, it launched Operation Janus--a false-flag...