During the last two centuries the expansion of the Empire implied a gradual realignment of all our frontiers, except on the greater part of that between us and China, which, from the valley of the Katuna to the mouth of the Schilka, remained unchanged for 200 years. The western frontier had moved from a distance of 300 miles from Moscow in 1700 to one of 670 miles. In the north-west and south we had reached natural boundaries in the Baltic and Black Seas. In the same period we had pushed forward our confines a considerable distance from the Caucasus and in Central Asia. The following figures show us roughly what the two main struggles, between the years 1700 and 1900, have cost us in men: In our efforts to reach the Black Sea we lost 750,000 out of 3,200,000[19] men put in the field against Turkey, while the conflict with Sweden for an approach to the Baltic cost us 700,000 out of the 1,800,000 combatants employed. This is sufficient to convey some idea of what sacrifices we must expect from our army in any attempt on our part to reach the shores of the Pacific and Indian Oceans during the present century. Moreover, the growth of our territory has forced us to include within it many and different foreign and even hostile races, and our frontier is to-day (1900),[20] from a military point of view, therefore less soundly established than it was in 1700. Though the population of the Empire has increased from 12,000,000 to 130,000,000, it must be remembered that we have now on and within our borders more than 40,000,000 who are only partly connected to us by racial ties, but are more or less alien both by religion and by their historical past. Within the same period peace reigned in Russia for 71-2/3 years. During the remaining 128-1/3 years there were thirty-three foreign and two internal wars, which can be classified, according to the political objects for which they were fought, in the following order: 1. For the expansion of the Empire—twenty-two wars, lasting about 101 years. 2. In defence of the Empire—four wars, lasting 4-1/4 years. 3. In the interests of general European politics—seven wars and two campaigns, taking 10 years. 4. Civil wars—two wars, lasting 65 years. 5. For the suppression of revolts—6 years of military operations. These conflicts exposed to the horrors of war some 10,000,000 of people, of whom about one-third were lost to the nation, nearly 1,000,000 being killed and wounded. The gradual change in the war establishment of the army (excluding militia, second line troops, and reserve) can be traced from the following figures: