In early 1942, he was approached by leaders of a left-wing resistance organisation, and he went on to play a leading role in setting up an embryonic paramilitary section. During the resistance he adopted the pseudonymValrimont, among others. When arrested in Lyon on March 15, 1942, his knowledge of German as a native of Alsace allowed him to conceal his true identity from his interrogators, and he thus faced only minor charges. On May 24 he escaped from prison with several colleagues and resumed his activities, organising sabotage in factories and opposing the drafting of French labour for the German war effort. By 1944 the resistance had complex coordination structures including a military action committee which directed the French Forces of the Interior. As a member of Comac, Kriegel was at the very top of the resistance. At the moment of the Normandy landings, Kriegel supported an immediate internal uprising of the French population. This was in contrast with the attitude of General Charles de Gaulle, whose strategy was tied to close cooperation with the allies. When street fighting broke out in Paris on August 19, de Gaulle's representatives negotiated a truce with the German commander. Kriegel and Henri Rol-Tanguy, the communist leader of the FFI in the city, denounced this. When the allied troops led by General Leclerc arrived in the city, Kriegel was one of the three leaders of the resistance who received the surrender of the German military governor of Paris, General Dietrich von Choltitz, on August 25, 1944.
Complex relationship with PCF
Maurice Kriegel-Valrimont, as he was now known, formally joined the French Communist Partyafter the war and was elected to parliament in 1945 to represent an Alsace constituency. From 1947 onward, he was a member of the party's central committee, and was given responsibility for its press bureau. In 1952, André Marty and Charles Tillon were excluded from the direction of the PCF. Maurice Kriegel-Valrimont voted for their exclusion but later wrote in his memoirs: "When I ask myself questions about my life, it is the only point where I find no excuses." After Nikita Khrushchev's 1956 denunciation of the crimes of Joseph Stalin, Kriegel tried to get the French communist party to adopt a more liberal line. This resulted in his disgrace, and he left the party in 1961, finding employment as an administrator in the social security system until retirement. In 1995, he was formally rehabilitated by the leader of the Communist party, and in 1997 he stood on the Communist list for the European parliamentary elections.