A comprehensive historical survey of Manx military structures from pre-Norman times through the Napoleonic era, covering beacon systems, the Norse ship-levy (skeita-thing), parish militia organisation under the Stanleys, the 1651 rebellion, 18th-century militia decline post-Revestment, volunteer corps, and Fencible regiments. Directly relevant to understanding civil-military organisation before and after the 1765 Revestment, particularly regarding the cessation of militia musters after Crown acquisition.