Napoleon had other intentions: 210,000 French troops would be launched eastwards from the camps of Boulogne and would envelop General Mack's exposed Austrian army if it kept marching towards the Black Forest.
Napoleon havde dog andre intentioner: 210.000 franske tropper ville blive sendt østpå fra lejrene ved Boulogne og skulle omringe general Macks udsatte østrigske hær, hvis den forsatte sin march mod Schwarzwald.