Aisne (river)
Not to be confused with Ain (river). Aisne The Aisne near the village of Soupir Country France Physical characteristics Main source Champagne-Ardenne 48°56′44″N 05°10′46″E / 48.94556°N 5.17944°E / 48.94556; 5.17944 ( Oise-Aisne ) River mouth Oise 49°26′1″N 2°50′49″E / 49.43361°N 2.84694°E / 49.43361; 2.84694 ( Oise-Aisne ) Coordinates: 49°26′1″N 2°50′49″E / 49.43361°N 2.84694°E / 49.43361; 2.84694 ( Oise-Aisne ) Length 356 km (221 mi) Discharge Average rate: 63 m 3 /s (2,200 cu ft/s) Basin features Progression Oise→ Seine→ English Channel Basin size 7,752 km 2 (2,993 sq mi) German trenches along the Aisne during World War I The Aisne running through Soissons The Aisne ( French: [ɛn] ) is a river in northeastern France. It is a left tributary of the Oise. It gave its name to the French department of Aisne. It was known in the Roman period as Axona . It rises in the forest of Argonne, at Rembercourt-Sommaisne, near Sainte-Menehould. It flows north and then