Boris III

King of Bulgaria."Boris III believed Bulgaria's future lay in maintaining neutrality while tilting politically towards the Axis. This policy regained him South Dobruja from Romania in 1940. Still refusing to declare war against the Allies or supply troops to Hitler, he was killed by a pro-Soviet assassin. 

Biographical dictionary of World War II / Boatner III, Mark M. - Novato, CA : Presidio Press, 1996. - p. 54