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History of the Decline and Fall of the Roman Empire — Volume 1

Edward Gibbon · 1782 (Written); 1845 (Revised)

passage 368 of 518 · Chapter I: The Extent Of The Empire In The Age Of The > Chapter XIII: Reign Of Diocletian And His Three Associates.—Part (1/10)

in brief
Gibbon contrasts Britain’s domestic threats with cross-continental frontier risks and argues Diocletian secured peace by encouraging barbarian dissension, building frontier camps from Egypt to Persia, and strengthening Rhine–Danube fortifications.

II.

Britain had none but domestic enemies to dread; and as long as the governors preserved their fidelity, and the troops their discipline, the incursions of the naked savages of Scotland or Ireland could never materially affect the safety of the province.

The peace of the continent, and the defence of the principal rivers which bounded the empire, were objects of far greater difficulty and importance. The policy of Diocletian, which inspired the councils of his associates, provided for the public tranquility, by encouraging a spirit of dissension among the barbarians, and by strengthening the fortifications of the Roman limit. In the East he fixed a line of camps from Egypt to the Persian dominions, and for every camp, he instituted an adequate number of stationary troops, commanded by their respective officers, and supplied with every kind of arms, from the new arsenals which he had formed at Antioch, Emesa, and Damascus. 32 Nor was the precaution of the emperor less watchful against the well-known valor of the barbarians of Europe. From the mouth of the Rhine to that of the Danube, the ancient camps, towns, and citidels, were diligently reëstablished, and, in the most exposed places, new ones were skilfully constructed: the strictest vigilance was introduced among the garrisons of the frontier, and every expedient was practised that could render the long chain of fortifications firm and impenetrable. 33 A barrier so respectable was seldom violated, and the barbarians often turned against each other their disappointed rage. The Goths, the Vandals, the Gepidæ, the Burgundians, the Alemanni, wasted each other’s strength by destructive hostilities: and whosoever vanquished, they vanquished the enemies of Rome. The subjects of Diocletian enjoyed the bloody spectacle, and congratulated each other, that the mischiefs of civil war were now experienced only by the barbarians. 34

32 (return) [ John Malala, in Chron, Antiochen. tom. i. p. 408, 409.]

33 (return) [ Zosim. l. i. p. 3. That partial historian seems to celebrate the vigilance of Diocletian with a design of exposing the negligence of Constantine; we may, however, listen to an orator: “Nam quid ego alarum et cohortium castra percenseam, toto Rheni et Istri et Euphraus limite restituta.” Panegyr. Vet. iv. 18.]

34 (return) [ Ruunt omnes in sanguinem suum populi, quibus ron contigilesse Romanis, obstinatæque feritatis poenas nunc sponte persolvunt. Panegyr. Vet. iii. 16. Mamertinus illustrates the fact by the example of almost all the nations in the world.]

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topics: empire and the rule of provinces · fortune and the turn of the wheel · military discipline and training · siege and fortification

History of the Decline and Fall of the Roman Empire — Volume 1 · Edward Gibbon · 1782–1845