Hello, I know this a very restrictive question and I hope someone knows enough about the Russian All-Military Union to answer this. I recently read about Yevgeny-Ludvig Karlovich Miller and was intrigued by his very eventful life.
I realize why he was an enemy of the NKVD and the Soviets because of his past in the White Army, the All-Military Union and his very anti-bolshevik activities.
My question is was he such a threat that it was worth all the troubles the NKVD took to capture him in Paris, smuggle him to the port of Le Havre then bring him to Moscow ? Was it worth the diplomatic risk with the French police and government ? Was he really such a threat ?
If anyone knows enough, and if there's even sources from the Soviets that exist or are available, then I am quite lucky. But his story really intrigues me.
I know this isn't exactly the most comprehensive answer, but I hope it helps.
Sources:
Alexander Barmine: One Who Survived
Silvio Pons: Stalin and the Inevitable War