After France surrendered in 1940, many French people believed their government had let them down and France went into a period of shock. Nazi - approved Vichy, governed by Marshal Petain, was further proof the politicians of France had let them down. After being assured the French army, along with the Maginot Line, was more than strong enough to defend against the German army, the French people were extremely surprised with the Blitzkrieg attacks. Marshal Petain had a high reputation during the early days of Vichy so his leadership gave it some stability and status. Also, after the British attack on Mers el Kebir there was a degree of anti-British sentiment in France. There was no hurry to create a massive resistance movement in France.