10th March 1831 The French Foreign Legion was established by King Louis-Philippe to support his war in Algeria.
French Foreign Legion, article from Wikipedia    https://en.wikipedia.org/wiki/French_Foreign_Legion

LA LÉGION MARCHE VERS LA FRONTE   Various recordings on YouTube      https://www.youtube.com/results?search_query=%22La+L%C3%A9gion+marche+vers+le+front%22+song
ADIEU, ADIEU   Recording, information and lyrics from French Foreign Legion information    https://foreignlegion.info/songs/adieu-adieu/#:~:text=Adieu%2C%20adieu%20(Bye%2Dbye,REI%20(1er%20RE%20now).&text=1.,3.&text=De%2

AUX LÉGIONNAIRES   Various recordings on YouTube       https://www.youtube.com/results?search_query=aux+legionnaires-chant+legion+etrangere