Fortified Sector of Mulhouse

The sector did not see significant action during the Battle of France, since the German crossings of the Rhine took place further north, near Colmar.

The fortifications of the Mulhouse sector were laid out in two major lines, one right on the Rhine, and another to the rear on the eastern edge of the Hardt forest.

The fortifications consisted entirely of casemates and blockhouses, constructed by the Commission d'Organisation des Régions Fortifiées (CORF), CORF was responsible for the major fortifications of the Maginot Line, but in this area no major positions or ouvrages were built.

[1] The riverbank fortifications were of a basic nature, with protection only up to 155mm caliber, machine gun armament and no electrical system.

Colonel Thiervoz Peacetime barracks and support: Boutzenheim and Kembs[4] The German offensive (Operation Kleiner Bär) across the Rhine was concentrated in the area near and to the north of Colmar, with little fighting in the Altkirch sector.

Remnants fell back to the Col de Stiftkopf on the 22nd, then the Rouge-Gazon farm where they were finally captured on 26 June.