The court martial heard that British soldiers used "conditioning" techniques to "soften up" Iraqi detainees.
The brigade suffered many losses on the tour, with seven killed and 40 wounded, and the court martial heard that the Taliban had hung body parts of members of the British military from trees as "trophies".
The historic court martial heard that the prisoners were forced to maintain a "stress position" - backs against a wall, arms stretched out in front - which has been banned by the British army for more than 30 years.
He was battered from head to toe so we let him go instead of arresting him.' The court martial heard that the men were named the Grim Reapers because they had recorded the 'first kill' in Iraq.
When seven British soldiers were prosecuted over the abuse of Iraqi civilians in army custody in late 2003 - one pleaded guilty and six were acquitted - the court martial heard that British military intelligence officers had been under pressure to "get more out of detainees".
The court martial heard the victim had been drinking heavily while the ship was docked at Bournemouth.
A sailor indecently assaulted a drunk colleague with a beer bottle and filmed it for the "amusement of others", a court martial heard.
The court martial heard the footage was taken in Helmand on 15 September 2011 by Marine B on his helmet-mounted camera.
Commander Diaz, 41, of Topeka, Kan., did not testify in the court-martial hearing at the Norfolk Naval Station.
The plea he entered Friday, in a court-martial hearing at Fort Carson, Colo., was to a lesser charge, desertion with intent to remain away permanently.
