Thanks for that info Al I would be more than interested for the facts. It is really up to you to proof your point. The purges which did take place occurred in 1937 and 1938 when the commander in chief, Marshall Tukhachevskii was shot along with 3 out of 5 marshalls, 14 out of 16 commanders, and about half of the 80,000 officer corps who were also either removed or executed. Following this, all the admirals were also removed or executed. You will no doubt already know, but in case it has slipped your memory Marshall Tukhachevskii was tried in secret as a conspirator almost entirely on a dossier produced by the NKVD, but which originated from the gestapo.
That is a purge, not simply a replacement or shuttling around of responsibilities.