Military success eventually prompted the Allies to support the Partisans, resulting in the successful Maclean Mission, but Tito declined their offer to help and relied on his own forces instead. All the major military offensives by the antifascist movement of Yugoslavia against Nazis and their local supporters were conducted in Bosnia and Herzegovina and its peoples bore the brunt of fighting. More than 300,000 people died in Bosnia and Herzegovina in World War II. At the end of the war, the establishment of the Socialist Federal Republic of Yugoslavia, with the constitution of 1946, officially made Bosnia and Herzegovina one of six constituent republics in the new state.