French bronze medal by J. P. Legastelois issued to commemorate the Battle of Marne. 
Obv: Military busts of Joffre, Maunoury and Gallieni to right, within two branches.
Rev: The France held a sword, accompanying the load of the infantry.
Dim: 68 mm.

Please not verdigris and patina loss to one spot on obverse. This should be apparent from images.