"Which exactly was the period when there were two countries which called itself Bulgaria, Istirbinski? Because the first time the ""westerners"" were mentioned was around 973 (if I remember exactly) when they appeared before the German emperor as representatives of the Bulgarian Empire and were admitted as such. I.e. after the fall of Preslav:-))) And a better proof than that this was a case of civil war can simply not exist. The Macedonian people rises against the dreadful Bulgars and calls its country Bulgaria, hahaha... Let's not become ridiculous, Istirbinski. And let's not quote mysterious documents that burned mysteriously in some mysterious monastery. The next thing you could say is that the Macedonians flew to the Moon but due to the dreadful Bulgars who burnt this and that document...   

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