As Brazzaville had been the capital of the large federation of French Equatorial Africa, it had an important workforce and many trade unions. Further radicalization elsewhere in Africa as a result of the decolonization led to revolt against the dictatorial rule of Youlou. Following Youlou's 6 August 1963 announcement of the formation of a one-party state with only one legal trade union, trade unions started their revolt on 13 August. Youlou's palace was besieged in August by angry workers and the French refused to intervene militarily, and he was forced to resign. This uprising is known as Les Trois Glorieuses (the Three Glorious Days), named after the French July Revolution against King Charles X in 1830. Fulbert Youlou and his main supporters were arrested by the military and ceased to play any further role in Congolese political life.