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After modern Romania was formed in 1859 through the union of Wallachia and rump Moldavia, and then extended in 1918 through the union of Transylvania, as well as Bukovina and Bessarabia (parts of Moldavia temporarily acquired by the Habsburgs, 1775–1918, respectively the Russian Tsars, 1812–1917), the administrative division was modernized using the French departments system as an example.