Aisne shares border with Ardennes
Aisne ( AYN, US also  EN; French: [ɛːn] (listen); Picard: Ainne) is a French department in the Hauts-de-France region of northern France. It is named after the river Aisne. In 2019, it had a population of 531,345.Geography
The department borders Nord (to the north), Somme and Oise (to the west), Ardennes and Marne (east), and Seine-et-Marne (south-west) and Belgium (Province of Hainaut) (to the north-east). The river Aisne crosses the area from east to west, where it joins the Oise. The Marne forms part of the southern boundary of the department with the department of Seine-et-Marne. The southern part of the department is the geographical region known as la Brie poilleuse, a drier plateau known for its dairy products and Brie cheese.
According to the 2003 census, the forested area of the department was 123,392 hectares, or 16.6% for an average metropolitan area of 27.4%.The landscape is dominated by masses of rock which often have steep flanks. These rocks appear all over the region, but the most impressive examples are at Laon and the Chemin des Dames ridge.
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