Abstract: The purpose of the work is to clarify the data of historiographic research and to present new facts about the supply of horses for the Kostroma militia during the Patriotic War of 1812.
The sources include documents from the funds of the Russian State Military Historical Archive, the Russian State Historical Archive and the State Archive of the Kostroma Region. The documentary data are compared with the texts of K.A. Voensky, V.R. Apukhtin, N.N. Vinogradov and others.
An important component of the information in the sources is the mechanisms for recruiting the equestrian staff of the main and reserve militias, the calculation of combat and draft horses, and the issues of handing over horses at the end of military operations. The documents allow us to assess the military-economic potential of the Kostroma province in the selected aspect. The results obtained allow us to assess and interpret indicators such as: general information on horse supplies, the ratio of quantitative indicators and the requirements of military articles, etc. In the future, it will be possible to use information about the provision of the Kostroma militia with horses to compare it with other militias of the 3rd district. The following conclusions were made based on the results of the study: firstly, despite significant irreparable losses in the regional archive, a comparison of documents and historiographical studies allows us to present a very interesting aspect of the history of the Kostroma militia of 1812; secondly, documentary materials reveal previously unknown aspects of the topic, for example, the supply of horses not only for the main, but also for the reserve militia.

Abstract: The purpose of the work is to clarify and detail the data of historiographical research on the problems of recruitment and material support of the Kostroma militia as one of the militias of the III district.
Among the sources, documents from the collections of the Russian State Military Historical Archive, the Russian State Historical Archive and the State Archive of the Kostroma Region are considered. The documentary data are compared with the texts of the works of K.A. Voensky, V.R. Apukhtin, N.N. Vinogradov and others.
An important component of the information sources, which has not been updated to date in historiography, are the mechanisms of recruitment, staffing, calculation of financing and provision of fodder, as well as instructions on accepting money and military property, accepting donations, resolutions on uniforms and equipment of warriors, issues of armament and training of recruits, as well as supply of the Kostroma militia. The documents allow us to establish the course of the discussion about the figures of giving warriors from noble estates and mechanisms for overcoming contradictions. In addition, the archives contain information about the social and everyday problems of the inhabitants of the province in connection with the events of 1812-1814 and ways to solve them. Special attention is paid to the problem of the coincidence of the time of recruitment and recruitment into the militia in 1812-1813 among the burghers of the Kostroma province.
The results obtained make it possible to clarify the chronology of the formation of the Kostroma province militia, to detail economic and financial indicators, such as: the size of donations, the burden on various estates when donating money and in kind, the size of salaries and one-time allowances for militia members.