The French Foreign Legion has dug in at the coast to gain time to withdraw to Corsica and later into exile. 
The Legion is well known to be tough fighters but so are you.
 
Advance slowly and cautious they are of a different calibre than the regular French Army. 

By the way there will be support from Gebirgsjaeger (Mountain) but the Luftwaffe is engaged at Dunkirk , so do not count on a lot of air support.
