The Union Soudanaise-Rassemblement Démocratique Africain (US-RDA Sudanese Union-African Democratic Rally) is a political party in Mali.
The Union Soudanais (US) was formed by nationalists in Soudan Français (French Sudan) to oppose French rule in the early 1930s. (It also attracted the support of pan-Arabist groups in region.) In 1945 it evolved into the Bloc Soudanais (Sudanese Bloc) under the leadership of Mamdou Konaté and Modibo Keïta. The following year it affiliated with the Rassemblement Démocratique Africain (RDA, African Democratic Rally), a Pan-Africanist political party for the whole of Afrique Occidentale Française (French West Africa) formed by Félix Houphouët-Boigny (of Côte d'Ivoire).
In 1956 the US-RDA won elections in Soudan Français for the French Assemblée Nationale (National Assembly), beating the Parti Progressive Soudanais (PPS, Progressive Sudanese Party) which had been the pre-eminent political party in the colony to that point. Mamdou Konaté died that year, and Modibo Keïta took full control of the party.
Following independence in 1960, the US-RDA became the sole political party of Mali. In September 1968 the party was effectively dissolved following a military coup by Moussa Traoré, and the leadership went underground.
In 1990 the remaining party members joined forces with other Malian democratic movements -- the Parti Malien pour la Révolution et la Démocratie (PMDR, Malian Party for Revolution and Democracy), the Parti Malien du Travail (PMT, Malian Labour Party), and the Front Démocratique et Populaire Malien, (FDPM, Malian Popular and Democratic Front) -- to form the Alliance pour la Démocratie en Mali (ADEMA, Alliance for Democracy in Mali).
After Moussa Traoré's removal from power by military coup, and a transitional military government headed by Amadou Toumani Touré, ADEMA's Alpha Oumar Konaré won the multi-party presidential election.