When the Algerian War was ripping apart the unstable Fourth Republic, the National Assembly brought him back to power during the May 1958 crisis. He founded the Fifth Republic with a strong presidency, and he was elected to continue in that role. He managed to keep France together while taking steps to end the war, much to the anger of the "Pieds-Noirs" (ethnic French born in Algeria) and the military; both previously had supported his return to power to maintain colonial rule. He granted independence to Algeria and acted progressively towards other French colonies. In the context of the Cold War, de Gaulle initiated his "politics of grandeur" asserting that France as a major power should not rely on other countries, such as the United States, for its national security and prosperity. To this end, he pursued a policy of "national independence" which led him to withdraw from NATO's military integrated command and to launch an independent nuclear development program that made France the fourth nuclear power. He restored cordial Franco-German relations to create a European counterweight between the Anglo-American and Soviet spheres of influence through the signing of the Élysée Treaty on 22 January 1963.