 He considered parachuting in, but was advised against it.Throughout the battle, Cogny and his superior Navarre were at odds on the disposition of forces between Dien Bien Phu, Cogny's own sector in the Tonkin Delta, and Navarre's Operation 'Atlante'.In response to a damning letter from Navarre on 29 March, Cogny informed his superior that he no longer wished to serve under his command.