Nyorai kupfuurira kweiyi ndima - Mukati maSeptember 1950, Segrétain akazivisa kutungamira kwenzvimbo nhatu dzakasimba dzezvombo apo varume vake vakaunganidza zvisaririra zvavo pamuganhu. 1er BEP yakagamuchira basa rekudzorera guta reDong Kje pamugwagwa wekoloni 4 (RC4) apo ichivimbisa kubatana neThat Khe iri makiromita makumi maviri kumaodzanyemba. Ichitarisana nemuvengi mukuru muhuwandu, 1er BEP yaizofanira kufamba yakananga ku cuvette yeCoc Xa; yakakomberedzwa nematombo uye zvinomera, 1er BEP (I kuumbwa) yakapa yekutanga yechinyakare Foreign Legion nhandare yehondo
Hondo Yokutanga yeIndochina iyo battalion yose yakaparadzwa. Mutungamiriri webatirioni "Chef de bataillon" Segrétain akatungamirira boka rake kusvikira pakuedza kwake kwokupedzisira. Pierre akafa nemaronda ake akaipisisa mukati mehusiku hwa7 kusvika 8 Gumiguru 1950, apo vapukunyuki vakanga vasara vebato vaive vachipinda mumitsara yevavengi kuti vadzore That Khe.