Poland. (French Detachment in Poland). 1919. Picture post card of 'Wolynsk Market' addresses to France cancelled by 'Tresor et Postes/ 302' date stamp in carmine '22nd May 19' with circular military cachet '1st Division Polonaise/ Le Payeur' in blue on face.
In the hope of achieving independence for their homeland following the war, volunteers fought on the Western Front against the Germans. After the armistice, these units (accompanied by their French officers) were transported home in April 1919. Military mail received a wide variety of markings related to the French Mission.
Very fine item from the French Military Detachment in Rowne, Poland in W.W.1
See Edward Klempka's wonderful book on the Foreign Military Activity in the Russian Civil War 1917 - 1923