 Germany had the largest economy in Europe but lacked many of the raw materials necessary for a modern industrial economy (making the "Reich" vulnerable to a blockade) and the ability to feed its population.The "guerre de longue durée" strategy called for the French to halt the expected German offensive meant to give the "Reich" a swift victory; afterwards, there would be an attrition struggle; once the Germans were exhausted France would begin an offensive to win the war.The Maginot Line was intended to block the main German blow, if it should come via eastern France, and to divert the main blow through Belgium, where French forces would meet and stop the Germans.