Union of Democratic Forces (Bulgaria)
political party in Bulgaria

The Union of Democratic Forces (Bulgarian: Съюз на демократичните сили, romanized: Sayuz na demokratichnite sili, СДС or SDS) is a political party in Bulgaria, founded in 1989 as a union of several political organizations in opposition to the communist government. The Union was transformed into a single unified party with the same name. The SDS is a member of the European People's Party (EPP). In the 1990s the party had the largest membership in the country, with one million members, but has since splintered into a number of small parties totaling no more than 40,000 members. The SDS proper had 12,000 members in 2016.
The party was a ruling party in Bulgaria during the period between 1991–1993 and 1997–2001.
History
Dissident groups formed under the faltering regime of Todor Zhivkov in the late 1980s were the basis for the Union. Once Zhivkov fell, a loose political confederation was envisioned where constituent groups could continue to work for their own cause, while the coordinating council would include three members from each organization. The Longtime dissident philosopher Zhelyu Zhelev, who would later become Bulgaria's president, was elected chairman, and Petar Beron, a well-known environmental scientist, was chosen as secretary.
The SDS was officially founded on 7 December 1989 as a union of eleven political organizations, such as Ekoglasnost, Bulgarian Social Democratic Workers' Party (United) and Bulgarian Agrarian People's Union "Nikola Petkov".
“Union of Democratic Forces (Bulgaria)” enters the record as political party in Bulgaria. Crown Archives preserves that source wording while asking what Union, Democratic and Forces can confirm, complicate or overturn.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jul 23, 2026. The linked authority identifier is Q841253. VIAF identifies the subject as 131478565. The Library of Congress control number is n90641473. 2 of 4 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1989, 2016, 1991 and 1993.
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This entry incorporates text from “Union of Democratic Forces (Bulgaria)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.