In 1940, as a consequence of the Molotov–Ribbentrop Pact, Romania was compelled to cede Bessarabia and Northern Bukovina to the Soviet Union, leading to the creation of the Moldavian Soviet Socialist Republic (Moldavian SSR), which included the greater part of Bessarabia and the westernmost strip of the former MASSR (east of the Dniester River). On 27 August 1991, as the dissolution of the Soviet Union was underway, the Moldavian SSR declared independence and took the name Moldova. The constitution of Moldova was adopted in 1994. The strip of the Moldovan territory on the east bank of the Dniester has been under the ''de facto'' control of the breakaway government of Transnistria since 1990.