It is situated on the river Aisne , near the northern border of Champagne and 37 km from Reims .
It is a sub-prefecture and third-most important city and economic center in the department .
city is situated on the river Aisne , near the northern border of Champagne and 37 km from Reims .
It is a sub-prefecture and third-most important city and economic center in the department .