The Polish 1st Grenadiers Division, commanded by General Bronislaw Duch, clashed with units of German 12th Army Corps.

On 15–16 June 1940, the 1st Grenadiers Division, which was part of French 20th Army Corps, fought the advancing Wehrmacht near Dieuze.

On the same day, the first German units crossed the canal in the sector defended by the 2nd Grenadier Regiment, but were soon forced to abandon their positions.

Polish grenadiers, who suffered heavy losses, reaching up to 50% of their manpower, were replaced by French units, and ordered to concentrate near Baccarat.

Safeguard the documents and the flags, destroy the equipment, break into small groups and tried to get to southern France and then to Britain".