The Transnistrian War (Romanian: Războiul din Transnistria; Russian: Война в Приднестровье, romanized: Voyna v Pridnestrovye) was an armed conflict that broke out on 2 November 1990 in Dubăsari between pro-separatist (Pridnestrovian Moldavian Republic, PMR; Transnistria) forces, including the Transnistrian Republican Guard, militia and neo-Cossack units, which were supported by elements of the Russian 14th Army, and pro-government forces, including Moldovan troops and police.
Fighting intensified on 1 March 1992 and, alternating with ad hoc ceasefires, lasted throughout the spring and early summer of 1992 until a ceasefire was declared on 21 July 1992, which has held. The conflict is sometimes known as the Dniester War (Romanian: Războiul de la Nistru) or the Moldovan–Russian war (Romanian: Războiul moldo-rus) in Moldova and Romania. According to Moldovan historian Gheorghe E. Cojocaru, the Moldovan defeat in this war directly led to the implementation of Moldovan neutrality.
Before the Soviet occupation of Bessarabia and Northern Bukovina and the creation of the Moldavian SSR in 1940, the Bessarabian part of Moldova, i.e. the part situated to the west of the river Dniester (Nistru), was part of Romania (1918–1940). The Molotov–Ribbentrop Pact between the Soviet Union and Nazi Germany, which led to the events of 1940, was later denounced by present-day Moldova, which declared it "null and void" in its Declaration of Independence in 1991. However, after the breakup of the Soviet Union, the territorial changes resulting from it have remained in place.
Before the creation of the Moldavian SSR, today's Transnistria was part of the Ukrainian SSR as an autonomous republic called the Moldavian Autonomous Soviet Socialist Republic, with Tiraspol as its capital (1924–1940). It represents slightly more than one tenth of Moldova's territory.
Under Soviet rule, the Moldavian SSR became subject to a Russification policy, including isolation from the Romanian cultural sphere and the imposition of the Cyrillic alphabet for the Romanian language. During the last years of the 1980s, the political landscape of the Soviet Union was changing due to Mikhail Gorbachev's policies of perestroika and glasnost, which allowed political pluralism at the regional (republican) level. In the Moldavian SSR, as in many other parts of the Soviet Union, national movements became the leading political force. As these movements exhibited increasingly nationalist sentiments and expressed intent to leave the USSR in favor of uniting with Romania, they encountered growing opposition from among the primarily Russian-speaking ethnic minorities living in the republic. This opposition to the new trends and potential future policies was manifested in a more visible way in Transnistria, where, unlike the rest of the MSSR, ethnic Moldovans (39.9%) were outnumbered by the combined figure of Russians and Ukrainians (53.8%) as per the 1989 census in Transnistria, largely due to higher immigration during the Soviet era.
While some believe that the combination of a distinct history (especially 1918–1940) and a fear of discrimination by Moldovans, gave rise to separatist sentiments, others believe that ethnic tensions alone fail to account for the dynamics of the conflict. According to John Mackinlay and Peter Cross, who conducted a study based on casualty reports, significant numbers of both Transnistrians and Moldovans fought together on both sides of the conflict. They suggest that the conflict is more political in nature.
On 31 August 1989, the Supreme Soviet of the Moldavian SSR enacted two laws. One of them made Moldovan the official language, in lieu of Russian, the de facto official language of the Soviet Union. It also mentioned a linguistic Moldo–Romanian identity. The second law stipulated the return to the Latin Romanian alphabet. Moldovan language is the term used in the former Soviet Union for a virtually identical dialect of the Romanian language during 1940–1989. On 27 April 1990, the Supreme Soviet of the Moldavian SSR adopted the traditional tricolour (blue, yellow and red) flag with the Moldavian coat of arms. Later that year, the words Soviet and Socialist were dropped and the name of the country was changed to "Republic of Moldova". In 1991, the national anthem was changed to Deșteaptă-te, române!, the national anthem of Romania since 1990.
These events, including the end of the Ceaușescu regime in neighboring Romania in December 1989 and the partial opening of the border between Romania and Moldova on 6 May 1990, led many in Transnistria and Moldova to believe that a union between Moldova and Romania was inevitable. This possibility caused fears among the Russian-speaking population that they would be excluded from most aspects of public life. From September 1989, there were strong scenes of protests in the region against the central government's ethnic policies. The protests developed into the formation of secessionist movements in Gagauzia and Transnistria, which initially sought autonomy within the Moldavian SSR, in order to retain Russian and Gagauz as official languages. As the nationalist-dominated Moldavian Supreme Soviet outlawed these initiatives, the Gagauz Republic and Transnistria declared themselves as separate from Moldova and announced their application to be reattached to the Soviet Union as independent federal republics.
The language laws presented a particularly volatile issue as a great proportion of the non-Moldovan population of the Moldavian SSR did not speak Moldovan (Romanian). The problem of the official language in the MSSR had become a Gordian knot, being exaggerated and, perhaps, intentionally politicized. Some described the language laws as "discriminatory" and criticized their rapid implementation. Others, on the contrary, complained the laws were not followed.
On 2 September 1990, the Pridnestrovian Moldavian Soviet Socialist Republic was proclaimed, "Pridnestrovie" being the name for Transnistria in Russian. On 22 December 1990 president Gorbachev signed a decree that declared void the decisions of the Second Congress of People Deputies of Transnistria from 2 September. For two months, Moldovan authorities refrained from taking action against this proclamation. Transnistria became one of the "unrecognized republics" that appeared throughout the USSR, alongside Abkhazia, South Ossetia and Nagorno-Karabakh. These self-proclaimed states maintained close ties with each other.
One of the first clashes between the Moldovan government and separatists occurred on 2 November 1990 in Dubăsari. Local women stormed the Court and Prosecutor's Office and stayed there for several hours. A police detachment was then dispatched to clear a roadblock placed by the city residents on the bridge over the river Dniester that effectively cut the city off from the central government. After being prevented from clearing the roadblock, policemen opened fire, with three residents of Dubăsari being killed and 13 wounded, resulting in the first casualties of the conflict.
In the aftermath of the failure of the Soviet coup attempt of 1991, on 27 August 1991, the Moldovan parliament adopted the Declaration of Independence of the Republic of Moldova. The declaration referred to the Molotov–Ribbentrop Pact as "null and void" and viewed Moldova's Independence as an act of elimination of "the political and legal consequences of the above", declaring that the establishment of the Moldavian SSR on the territories of Bessarabia, Northern Bukovina, Hertsa region and the Moldavian ASSR was made in absence of "any real legal basis". The PMR interpreted this as meaning that the 1940-merger of the two sides of the Dniester river was dissolved. Moldova, however, did not agree, as large portions of the territory occupied in 1940 by the USSR remain in Ukraine, and almost immediately took steps to assert its sovereignty over the full territory of the former MSSR.
At that time, the Republic of Moldova did not have its own army, and the first attempts to create one took place in early 1992 in response to the escalating conflict. On 27 August 1991, the newly independent Moldovan parliament had declared independence and asked the government of the USSR "to begin negotiations with the Moldovan government in order to put an end to the illegal occupation of the Republic of Moldova and withdraw Soviet troops from Moldovan territory".