On 21 December 1941, the Partisans created the First Proletarian Brigade (commanded by Koča Popović) and on 1 March 1942, Tito created the Second Proletarian Brigade. In liberated territories, the Partisans organised People's Committees to act as civilian government. The Anti-Fascist Council of National Liberation of Yugoslavia (AVNOJ) convened in Bihać on 26–27 November 1942 and in Jajce on 29 November 1943. In the two sessions, the resistance representatives established the basis for post-war organisation of the country, deciding on a federation of the Yugoslav nations. In Jajce, a 67-member "presidency" was elected and established a nine-member National Committee of Liberation (five communist members) as a de facto provisional government. Tito was named President of the National Committee of Liberation.

When did the Partisans create the First Proletarian Brigade?