Geiseric's Vandals and Alans, however, had their own plans, and aimed to conquer the African provinces outright. Their possession of Mauretania Caesariensis, Mauretania Sitifensis and most of Numidia was recognized in 435 by the Western Roman court, but this was only a temporary expedient. Warfare soon recommenced, and in October 439, the capital of Africa, Carthage, fell to the Vandals. In 442, another treaty exchanged the provinces hitherto held by the Vandals with the core of the African diocese, the rich provinces of Zeugitana and Byzacena, which the Vandals received no longer as "foederati" of the Empire, but as their own possessions. These events marked the foundation of the Vandalic Kingdom, as the Vandals made Carthage their capital and settled around it.