The 1800 campaign in southwest Germany began on 1 May 1800, at the village of Büsingen, 4 kilometers east of Schaffhausen (Switzerland); there a small force of 6,000 men under command of General of Brigade François Goullus defeated 4,000 men, three battalions of the 7th Infantry Regiment Schröder, commanded by Lieutenant Field Marshal Karl Eugen, Prince von Lothringen-Lambesc.