If you want to use your word order, you need another comma - in 'and, for Ukraine's territory, unique'. But I think the original order is better because the two adjectives come together. The em dashes are OK as markers of the parenthesis, you could, of course, use parentheses ("()"). In current British publishing practice, the em dashes should be separated from the words they separate with spaces; in US practice - last time I had to deal with it - the spaces aren't needed.
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