After the attack Attack at Mers-el-Kébir and the Battle Military_operation of Dakar , French aircraft raided Attack Gibraltar in retaliation Revenge and Marshal Philippe Pétain , who had become Becoming the prime minister of France on 16 June , severed Process_end diplomatic relations with the United Kingdom .

On 10 July , Marshal Pétain was installed Change_of_leadership as leader of the new French State .

The failure of the Nivelle strategy and the high number of French casualties led to Causation mutinies and the dismissal of Nivelle , his replacement by Pétain and the adoption of a defensive strategy by the French , while their armies recuperated Recovering and were rearmed .