An initially independent and later autonomous state , it existed from the 14th century to 1859 , when it united with Wallachia as the basis of the modern Romanian state ; at various times , the state included the regions of Bessarabia ( with the Budjak ) and all of Bukovina .
It existed from the 14th century to 1859 , when it became one with Wallachia as the basis of the modern Romanian state ; at various times , it included the regions of Bessarabia ( with the Budjak ) and much of Bukovina .