Hi!
I don't know your options, but I have some suggestions:
if not all the facts have been discovered yet, then the historians will have a hard time interpreting the facts, They will also have a hard time understanding the causes of the events (since they are missing some information)
The event was called the Great Purge. Several Soviet officials and high ranking people were arrested during this event. Some were even executed.
Answer:
All states supported but New Hampshire and Rhode Island