Both armies regrouped after the battle of Kassel
The Russians entered Kassel
2, 5 and 6 French retreated towards Willingen
14 French corps abandoned their lines of supply
They captured the main Russian supply depot of Friedland
The Russians have only two depots, and most of their supplies are at Friedland
It is also the main supply and communication road to their main base at Dresden
The loss of this town is a serious setback.