Stock Photo - La journee du Poilu. 25-26 decembre 1915. Avec vous et par vous, nous jurons de sauver la France. Leon Gambetta. Two French soldiers, one sitting down and going through a small box of supplies sent from home. Leon Gambetta (1838-1882) was one of the founders of the Third Republic and was regarded as one of the heroes of the Franco-Prussian War of 1870-71. He became premier of France for a short while in 1881. Date 1915. La journee du Poilu. 25-26 decembre 1915. Avec vous et par vous, nous jurons de sauver la France. Leon Gambetta. Two French soldiers, one sitting down and going through a small box of supplies sent from home. Leon Gambetta (1838-1882) was one of the founders of the Third Republic and was regarded as one of the heroes of the Franco-Prussian War of 1870-71. He became premier of France for a short while in 1881. Date 1915.