WASHINGTON, D.C. -

The U.S. Army has demoted a Fort Bragg brigadier general at the center of a sexual misconduct case by two grades.

The move slashes his retirement pay by forcing him to retire as a lieutenant colonel.

Brig. Gen. Jeffrey A. Sinclair had a three-year affair with a female captain who accused him of twice forcing her to perform oral sex on him. He pleaded guilty at a court martial to adultery and conducting inappropriate relationships with two others.

It's the first time the Army has reduced a retiring general officer by two ranks in a decade. Army Secretary John McHugh says Sinclair displayed a pattern of inappropriate and at times illegal behavior as a colonel and a one-star general.

Sinclair was spared prison and fined $20,000.