were these the ones with a lot of colonial units in it?

http://www.1dfl.fr/decouvrez-ses-unites/bataillon-de-marche-n-3/
Yep, that's the one. Raised in Chad in late 1940 with native troops around a cadre of French officers. I haven't been able to find pictures which specifically depict their appearance during the 1941 Erytrean campaign.