A four-star general who was relieved of command this week said Wednesday through his lawyer that the Army took the action after an investigation into accusations that he was involved in a consensual relationship with a female civilian. The lawyer, Lt. Col. David H. Robertson, said the case involves an adult relationship with a woman who is not in the military, nor is a civilian employee of the military or the federal government." The general, Kevin P. Byrnes, was relieved Monday by the Army chief of staff, Gen. Peter J. Schoomaker, just a few months before General Byrnes was scheduled to retire as head of the Army Training and Doctrine Command. Relieving a four-star general of command is unusual, and several Army officers said they considered the punishment surprisingly harsh for a general who was nearing retirement anyway.