Group of prominent American historians issued a statement, noting that PL 86-90 is largely based on historical misinformation and commits the United States to help some mythical "nations" such as "Cossackia" and "Idel-Ural".
Calls for an independent Cossackia emerged within the vibrant émigré Cossack community in Prague, Czechoslovakia, later in the 1920s.
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The 1959 U.S. public law on Captive Nations listed Cossackia among the nations living under oppression of the Soviet regime.