Darn, I just realized that this refrain actually continues on until the end of the OKW West meeting in the next scene. The same music is used in DDW Nr. 512 (Verdun scene) and Nr. 749 (Volksgrendiere scene). So two out of three scenes are related to France.
Nope. I correct myself again. The melody played during Joseph Darnand's speech in Nr. 715 does not carry over through the OKW West meeting scene following it. I've found the former refrain also appearing in Nr. 730 around the 3:00 mark.