Gareth Russell - Historian/Author - On 3 October 1918, Crown Prince Boris succeeded to the Bulgarian throne as Tsar Boris III. The second member of the House of Saxe-Coburg-Gotha-Koháry to rule Bulgaria,
What is the evidence for the theory that Tsar Boris III of Bulgaria was poisoned by the Nazis? - Quora
What is the evidence for the theory that Tsar Boris III of Bulgaria was poisoned by the Nazis? - Quora
![Wilhelm Groener (November 22, 1867 — May 3, 1939), German military, politician, Soldier | World Biographical Encyclopedia Wilhelm Groener (November 22, 1867 — May 3, 1939), German military, politician, Soldier | World Biographical Encyclopedia](https://prabook.com/web/show-photo.jpg?id=1499441)