Plan seventeen was a plan used in World War I. It was the French battle plan. The French were feeling resentful towards the German because of the Prussian war forty years prior. The Prussians, now Germans, had taking the provinces of Alsace and Lorraine from the French. The French planned to take them back. Plan seventeen involved an all out attack on Alsace and Lorraine by soldiers who fought fast and deadly, no matter the odds. They wanted to win back their lost provinces. Unfortunately, the plan failed and the French retreated to stop the Germans attacking in the Schlieffen Plan.