The integrity of a land-frontier is guaranteed by the whole strength of the nation included within it, and can only be modified by a struggle for existence with the neighbor on whom it borders; but islands by their geographical nature constitute independent political units, easily detached from or incorporated with larger domains, according to the momentary fluctuation in the balance of sea-power. Thus it happened that the arrival of the _Goeben_ and _Breslau_ at the Dardanelles in August 1914 led Turkey to reopen promptly certain questions concerning the Aegean. The islands in this sea are uniformly Greek in population, but their respective geographical positions and political fortunes differentiate them into several groups. 1. The Cyclades in the south-west, half submerged vanguards of mountain ranges in continental Greece, have formed part of the modern kingdom from its birth, and their status has never since been called into question. 2. Krete, the largest of all Greek islands, has been dealt with already. She enjoyed autonomy under Turkish suzerainty for fifteen years before the Balkan War, and at its outbreak she once more proclaimed her union with Greece. This time at last her action was legalized, when Turkey expressly abandoned her suzerain rights by a clause in the Treaty of London. 3. During the war itself, the Greek navy occupied a number of islands which had remained till then under the more direct government of Turkey, The parties to the Treaty of London agreed to leave their destiny to the decision of the powers, and the latter assigned them all to Greece, with the exception of Imbros and Tenedos which command strategically the mouth of the Dardanelles. The islands thus secured to Greece fall in turn into several sub-groups. Two of these are _(a)_ Thasos, Samothraki, and Lemnos, off the European coast, and _(b)_ Samos and its satellite Nikarià, immediately off the west coast of Anatolia; and these five islands seem definitely to have been given up by Turkey for lost. The European group is well beyond the range of her present frontiers; while Samos, though it adjoins the Turkish mainland, does not mask the outlet from any considerable port, and had moreover for many years possessed the same privileged autonomy as Krete, so that the Ottoman Government did not acutely feel its final severance.