In the region east of the Dniester river, Transnistria, which includes a large proportion of predominantly russophone East Slavs of Ukrainian (28%) and Russian (26%) descent (altogether 54% as of 1989), an independent Pridnestrovian Moldavian Soviet Socialist Republic was proclaimed on 16 August 1990, with its capital in Tiraspol. The motives behind this move were fear of the rise of nationalism in Moldova. In the winter of 1991–1992 clashes occurred between Transnistrian forces, supported by elements of the 14th Army, and the Moldovan police. Between 2 March and 26 July 1992, the conflict escalated into a military engagement. It was a brief war between Moldovan and separatist Transnistrian forces, with Russia intervening militarily on Transnistria's side. It ended with a ceasefire and the establishment of a security zone policed by a three-way peacekeeping force of Russian, Transnistrian, and Moldovan personnel.