Translation of "Tilsit" in English

Suite au traité de paix de Tilsit, Davout est devenu gouverneur général du

Following the peace treaty of Tilsit,  Davout became governor-general of the  

Et c'est la Prusse qui perdra le plus dans les traités de Tilsit, signés deux semaines plus tard.

And it was Prussia who would lose most in the Treaties of Tilsit, signed two weeks later.