To be honest I am surprised that such film footage [in color] even exists.
The overland relief march to lift the siege of Dien Bien Phu. Partisan units of hill tribesmen loyal to the French during the First Indo-China War as commanded by Captain Jean Sassi. This was Operation Desperado.
Sasse at the time a relatively junior officer and initiating the overland relief operation to Dien Bien Phu on his own authority. A relief operation aborted, permission denied by higher authority, Jean Sassi and his forces in position, poised, ready. From the video settings you can turn on auto-translate to English or other languages.
IN ALL LIKELIHOOD THE RELIEF OPERATION TO DIEN BIEN PHU WOULD HAVE PROBABLY FAILED, SO DOOMED WAS THE FRENCH GARRISON! ABOUT ONE-HUNDRED FIFTY FRENCH ESCAPEES HOWEVER WERE REPATRIATED DUE TO THE EFFORTS OF JEAN SASSI AND HIS PARTISANS.