The fall of the second phase of the Concert of Europe can be attributed largely to the rival alliance systems – the Triple Alliance (Germany, Austria-Hungary, and Italy) and the Triple Entente (France, Russia, and the United Kingdom) – which formed a rift in the European States. These rival alliances threatened the underlying nature of the Concert, which relied on "ad hoc" alliances to respond to a given situation. Later conferences including the Algeciras Conference of 1906 defusing the First Moroccan Crisis, showed that the Conference System was still viable for resolving disputes, but further cemented the adversarial relationship between the two camps.