De Gaulle was optimistic that France's colonies in western and central Africa, which had strong trading links with British territories, might be sympathetic to the Free French. Pierre Boisson, the governor-general of French Equatorial Africa, was a staunch supporter of the Vichy regime, unlike Félix Éboué, the governor of French Chad, a subsection of the overall colony. Boisson was soon promoted to "High Commissioner of Colonies" and transferred to Dakar, leaving Éboué with more direct authority over Chad. On 26 August, with the help of his top military official, Éboué pledged his colony's allegiance to Free France. By the end of August, all of French Equatorial Africa (including the League of Nations mandate French Cameroun) had joined Free France, with the exception of French Gabon.