The aim of this article is to analyse issues related to organising the administration for the army in the Duchy of Warsaw. During this period, the issue of feeding the army was first under the control of civil authorities, namely the Food Committee (1807-1809), then was taken over by military authorities (1810-1811), and finally returned to civil authorities. The analysis covers the course of legislative work preceding the establishment of the permanent food administration under military authority, and the provisions of the royal decrees establishing this administration.