The fighting takes place in the Soummam Valley, Akfadou and Djudjura, in kabylia wilaya (III).

The General Massu also mentioned this operation in his book -le torrent et la digue- on page 266 he wrote: « and it will be the first time in the history of the Algerian war that a "commander in chief" will personally command an operation called "jumelles"...» it is General Challe himself who led this operation.

The first phase of the operation was called Pelvoux, and was fought between 22 July and 9 August.

French marines led by the captain of the Sanguinetti frigate entered the Akfadou forest.

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