フリートラントの戦い
The embassy of Gardanne to Persia soon lost one of the main reasons for its original dispatch. In a final reversal, Napoleon I finally vanquished Russia at the Battle of Friedland in July 1807, and France and Russia became allied at the Treaty of Tilsit. General Gardanne arrived in Tehran in Persia after the Treaty of Tilsit, in December 1807.