![Bulgarian leader Bogdan Filov (standing) and German foreign minister Joachim von Ribbentrop (seated, center) during the signing of ... [LCID: tl118]](https://encyclopedia.ushmm.org/images/large/603d83d8-89db-4c11-b56d-5484a5952b19.jpg)
Bulgarian leader Bogdan Filov (standing) and German foreign minister Joachim von Ribbentrop (seated, center) during the signing of the Tripartite Pact. This treaty formally aligned Bulgaria with the Axis powers. Vienna, Austria, March 1, 1941.
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