XVII LOSS OF STATE TERRITORY
Hall, § 34—Phillimore, I. §§ 284-295—Moore, I. §§ 89 and 90—Holtzendorff in Holtzendorff, II. pp. 274-279—Gareis, § 70—Liszt, § 10—Ullmann, § 101—Pradier-Fodéré, II. Nos. 850-852—Rivier, I. § 13—Fiore, II. No. 865—Martens, I. § 92.
Six modes of losing State Territory.
§ 244. To the five modes of acquiring sovereignty over territory correspond five modes of losing it—namely, cession, dereliction, operation of nature, subjugation, prescription. But there is a sixth mode of losing territory—namely, revolt. No special details are necessary with regard to loss of territory through subjugation, prescription, and cession, except that it is of some importance to repeat here that the historical cases of pledging, leasing, and giving territory to another State to administer are in fact, although not in strict law, nothing else than cessions[474] of territory. But operation of nature, revolt, and dereliction must be specially discussed.
[474] See above, §§ [171] and [216].
Operation of Nature.
§ 245. Operation of nature as a mode of losing corresponds to accretion as a mode of acquiring territory. Just as through accretion a State may become enlarged, so it may become diminished through the disappearance of land and other operations of nature. And the loss of territory through operation of nature takes place ipso facto by such operation. Thus, if an island near the shore disappears through volcanic action, the extent of the maritime territorial belt of the respective littoral State is hereafter to be measured from the low-water mark of the shore of the continent, instead of from the shore of the former island. Thus, further, if through a piece of land being detached by the current of a river from one bank and carried over to the other bank, the river alters its course and covers now part of the land on the bank from which such piece became detached, the territory of one of the riparian States may decrease through the boundary line being ipso facto transferred to the present middle or mid-channel of the river.
Revolt.
§ 246. Revolt followed by secession is a mode of losing territory to which no mode of acquisition corresponds.[475] Revolt followed by secession has, as history teaches, frequently been a cause of loss of territory. Thus the Netherlands fell away from Spain in 1579, Belgium from the Netherlands in 1830, the United States of America from Great Britain in 1776, Brazil from Portugal in 1822, the former Spanish South American States from Spain in 1810, Greece from Turkey in 1830, Cuba from Spain in 1898, Panama from Colombia in 1903. The question at what time a loss of territory through revolt is consummated cannot be answered once for all, since no hard-and-fast rule can be laid down regarding the time when it can be said that a State broken off from another has established itself safely and permanently. The matter has, as will be remembered, been treated above (§ 74), in connection with recognition. It may well happen that, although such a seceded State is already recognised by a third Power, the mother country does not consider the territory to be lost and succeeds in reconquering it.
[475] The possible case where a province revolts, secedes from the mother country, and, after having successfully defended itself against the attempts of the latter to reconquer it, unites itself with the territory of another State, is a case of merger by cession of the whole territory.