But the harsh measures taken by the Russians to bring the forest tribes under their authority were bitterly resented; and in 1824 two of their generals were fatally stabbed in Tchetchnia by one of several villagers whom they were disarming. This murder was avenged by Yermoloff, as usual, relentlessly, but it was his last campaign in the Caucasus. In 1826 the Persians, who had been incensed by Yermoloff's rough ways on their frontier and by his insolent diplomacy, invaded Russian territory with a strong army. The Russians were unprepared, and at first could only act on the defensive. The flames of insurrection at once broke out among the tribes; the whole country fell back into confusion, and the Emperor Nicholas, holding Yermoloff responsible for this disastrous state of affairs, reprimanded and recalled him. He lived in retirement until 1861, revered by the Russian nation as the type and model of a valiant soldier and a devoted patriot who won brilliant victories and conquered large territories for the empire. But on his system and its consequences Mr. Baddeley pronounces a judgment which in fact points the moral of his whole narrative, and explains the history of the events that followed Yermoloff's departure: 'He gained brilliant victories at slight cost; and brought for a time the greater part of Daghestan under Russian dominion.... He absorbed the Persian and Tartar khanates, and treated Persia with astonishing arrogance. But it was these very measures and successes that led, on the one hand, to the Persian War and the revolt of the newly-acquired provinces; on the other, to that great outburst of religious and racial fanaticism which, under the banner of Muridism, welded into one powerful whole so many weak and antagonistic elements in Daghestan and Tchetchnia, thereby initiating the bloody struggle waged unceasingly for the next forty years. Daghestan speedily threw off the Russian yoke, and defied the might of the mother empire until 1859. In Tchetchnia mere border forays conducted by independent partisan leaders ... developed into a war of national independence under a chieftain as cruel, capable, and indomitable as Yermoloff himself.' The Persian War ended in 1828, but in the same year hostilities broke out with Turkey, involving the Russian troops on the Georgian frontier in hard and hazardous fighting, which lasted, with a great expenditure of men and money, until peace was concluded in 1829. From that year until 1854, when the Crimean War began, Russia had a free hand in the Caucasus, and applied her strength with inexorable energy to its subjugation. And it is to the rise and spread of the ferocious enthusiasm which Mr. Baddeley has called _Muridism_ that he attributes the striking fact that the complete conquest of the country was only accomplished in 1864--that the tribes held out against the forces of the Russian empire for more than thirty years.