I guess you're being pedantic now, don't let me get in the way. Also, not sure if China, Argentina, Brazil, Peru, Portugal, France, Thailand, countries in Africa, Nigeria, Australia, etc are considered 'eastern bloc', but lets just say the are. OK, then?
What does any of this have to do with forex btw? I don't think in any of those cases there was any problems with the exchange system itself, rather the individual countrys/currency.
If my points are considered petty, you are more than free to ignore my comments. I believe I already addressed your alternative question. Forgive me I suppose for not putting as much faith in backtesting as you do if you will.