Hall, § 147--Lawrence, §§ 193-194--Westlake, II. pp. 120-132--Maine, pp. 117-122--Manning, pp. 183-184--Phillimore, III. § 347--Twiss, II. § 73--Halleck, II. pp. 80-82--Taylor, § 547--Wharton, III. §§ 342-345--Wheaton, § 355--Bluntschli, §§ 665-667--Heffter, § 139--Geffcken in Holtzendorff, IV. pp. 547-548, 571-581--Ullmann, §§ 187-188--Bonfils, Nos. 1268, 1294-1338--Despagnet, Nos. 647-649--Pradier-Fodéré, VIII. Nos. 3066-3090, 3107-3108--Nys, III. pp. 433-466--Rivier, II. pp. 329-335--Calvo, IV. §§ 2123, 2379-2410--Fiore, III. Nos. 1399-1413--Pillet, pp. 118-120--Perels, § 36--Testa, pp. 147-157--Boeck, Nos. 3-153--Lawrence, _Essays_, pp. 278-306--Westlake, _Chapters_, pp. 245-253--Ortolan, I. pp. 35-50--Hautefeuille, I. pp. 161-167--Gessner, Westlake, Lorimer, Rolin-Jaequemyns, Laveleye, Albéric Rolin, and Pierantoni in _R.I._ VII. (1875), pp. 256-272 and 558-656--Twiss, in _R.I._ XVI. (1884), pp. 113-137--See also the authors quoted below, § 178, p. 223, note 1. [Sidenote: Aims and Means of Sea Warfare.] § 173. The purpose of war is the same in the case of warfare on land or on sea--namely, the overpowering of the enemy. But sea warfare serves this purpose by attempting the accomplishment of aims different from those of land warfare. Whereas the aims of land warfare are defeat of the enemy army and occupation of the enemy territory, the aims[342] of sea warfare are: defeat of the enemy navy; annihilation of the enemy merchant fleet; destruction of enemy coast fortifications, and of maritime as well as military establishments on the enemy coast; cutting off intercourse with the enemy coast; prevention of carriage of contraband and of rendering unneutral service to the enemy; all kinds of support to military operations on land, such as protection of a landing of troops on the enemy coast; and lastly, defence of the home coast and protection to the home merchant fleet.[343] The means by which belligerents in sea warfare endeavour to realise these aims are: attack on and seizure of enemy vessels, violence against enemy individuals, appropriation and destruction of enemy vessels and goods carried by them, requisitions and contributions, bombardment of the enemy coast, cutting of submarine cables, blockade, espionage, treason, ruses, capture of neutral vessels carrying contraband or rendering unneutral service. [Footnote 342: Aims of sea warfare must not be confounded with ends of war; see above, § 66.] [Footnote 343: Article 1 of the U.S. Naval War Code enumerates the following as aims of sea warfare:--The capture or destruction of the military and naval forces of the enemy, of his fortifications, arsenals, dry docks, and dockyards, of his various military and naval establishments, and of his maritime commerce; to prevent his procuring war material from neutral sources; to aid and assist military operations on land; to protect and defend the national territory, property, and sea-borne commerce.]