Articles of War

The Articles of War are a set of regulations drawn up to govern the conduct of a country's military and naval forces. The phrase was first used in 1637 in Robert Monro's His expedition with the worthy Scots regiment called Mac-keyes regiment etc. (in the form "Articles of warres") and can be used to refer to military law in general. In Swedish, the equivalent term Krigsartiklar, is first mentioned in 1556. However, the term is usually used more specifically and with the modern spelling and capitalisation to refer to the British regulations drawn up in the wake of the Glorious Revolution and the U.S. regulations later based on them.

Throughout the Articles' existence, there were separate sets for the navy and army.

The UK's (or rather England's) first Articles of War were written for the Royal Navy. They formed the statutory provisions regulating and governing the behaviour of members of the Royal Navy. They were prominently displayed in all naval ships, and set out a list of criminal provisions which applied to members of the Royal Navy and others to whom the Act applied, in addition to the criminal law of England and Wales and any local criminal law.

The naval Articles of War were originally issued by the Lords Commissioners of the Admiralty in 1653 as fighting instructions after defeat at the Battle of Dungeness. Soon after the Restoration, they were converted into an Act of Parliament. After another defeat at the Battle of Toulon, Parliament amended the Articles in 1749, further tightening discipline. These Articles resulted in the execution of Admiral John Byng, despite a clear sentiment in the navy and in Parliament that he should be given some lesser punishment. In response, the 1779 amendment was the start of a gradual process of easing the more draconian punishments. The naval Articles were retained in the 1957 Naval Discipline Act but then replaced by the provisions of the tri-service Armed Forces Act 2006.

...
Wikipedia