Uber Die Militairokonomie Im Frieden und Krieg, und Ihr Wechselverhaltniss zu den Operationen

Russian soldiers in bivouac 1813

Written by Count Yegor Frantsevich Kankrin (Егор Францевич Канкрин) (16 November 1774 – 10 September 1845) as a three volume set in 1820, it followed his service in the Russian Army as a Commissary during the Napoleonic Wars. In 1823, he was appointed Finance Minister, a post he would hold for the next 21 years, his most singular achievement being the reform of the Russian currency.

His book on military supply expands on Clausewitz's theme that armies can best live by requisitioning from the local authorities and can, in most circumstances live without magazine supply, which he considers limits the manoeuvrability of armies. However he goes further than Clausewitz, giving detailed statistics on the availability of supplies in seven categories of terrain from highly cultivated lands to desert, with examples of actual countries or provinces that correspond to these categories. Using these statistics and calculations on the supply requirement of a typical corps, he shows the method of supply needed for each of these terrain categories, highly cultivated terrain can support a corps by requisitioning and quartering, medium cultivated terrain is the same with the support of some magazine supply, lightly cultivated terrain requires magazine supply and limits the size of the army, while semi-desert and desert can only support small forces.

Bibliographic listing: Kankrin, Y. F. Uber Die Militairokonomie Im Frieden und Krieg, und Ihr Wechselverhaltniss zu den Operationen.

Free e-book version on Google books.  Band-1 Band-2 Band-3 Please note that the Google numbering is incorrect but the correct volume number is shown in German on the title page.

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Krankrin's book is unclear as to the area of land required by his typical Corps for foraging in his seven categories of terrain and their associated population density. However Clausewitz does give an indication of the area of land needed to sustain a Corps of 30,000 men for a couple of days when the population density is 2,000-3,000 inhabitants per Q Meile (35-55 people per km sq) which is a square of 2 Q Meile sides (15 km) or an area of 4 Q Meile (225 km sq). By combining these two approaches it is possible to quantify Krankin's model.

Number of troops sustained by certain levels of population density – Kankrin methodology
	Population density inhabitants per Q Meile	Population density (inhabitants per km2)	Foraging square of 2 Q Meile (15 km2)	Countries 1820	Supply method
Area			4 QM or 225 km2
Highly cultivated	3,000	53	48,000	France	Requisition
Highly cultivated	2,000	35	32,000	Prussia	Requisition
Medium cultivated	1,500	26	24,000	Poland	Requisition & Magazine
Medium cultivated	1,000	18	16,000	Spain	Requisition & Magazine
Little cultivated	800	14	12,800	Russia	Magazine supply
Semi-desert	300	5	4,800	Turkey	Unsuitable for large armies
Desert	150	3	2,400	Mountains	Short distances for small corps