The Aisne is a river located in northern France, flowing through the regions of Hauts-de-France and Grand Est. It is approximately 346 kilometers long and is a tributary of the Oise River. The river is known for its scenic landscapes and historical significance, particularly during the World War I battles. The Aisne region is also home to several towns, including Laon and Soissons, which are rich in history and culture. The river's banks are lined with beautiful countryside, making it a popular destination for outdoor activities such as hiking and cycling. The Aisne plays an important role in the local ecosystem and economy.