Transnistria

Transnistria, officially the Pridnestrovian Moldavian Republic (PMR), is a narrow strip of land between the Dniester river and Moldova's border with Ukraine. It declared independence from the Moldavian SSR in September 1990, fearing that Moldova would unify with Romania as the Soviet Union dissolved. After Moldova itself became independent in 1991, tensions escalated into a short armed conflict in spring–summer 1992, ending with a ceasefire signed in Moscow in July 1992 by Russian President Boris Yeltsin and Moldovan President Mircea Snegur. Russia's 14th Army, then commanded by General Alexander Lebed, intervened on the side of Transnistrian forces, and Russian troops have remained in the territory ever since as part of a "peacekeeping" contingent and as guards for a large Soviet-era ammunition depot at Cobasna.

The territory is not recognized by any UN member state. It is recognized only by other post-Soviet de facto states such as Abkhazia and South Ossetia. It maintains its own currency (the Transnistrian ruble), parliament, security services, and border controls, and is heavily dependent on Russian subsidies — particularly free or below-market natural gas delivered via Moldovagaz, which accumulated multi-billion-dollar arrears to Gazprom.

Negotiations occur in the "5+2" format: Moldova and Transnistria as parties; Russia, Ukraine, and the OSCE as mediators; and the EU and United States as observers. Talks have been largely frozen since 2019 and effectively suspended after Russia's full-scale invasion of Ukraine in February 2022, which left Transnistria geographically isolated from Russia and economically squeezed. In February 2024, a congress of Transnistrian deputies asked Moscow for "protection," prompting concern in Chișinău and Kyiv about possible escalation, though no annexation followed.

Transnistria is frequently cited as a model "frozen conflict" alongside Nagorno-Karabakh, Abkhazia, South Ossetia, and the pre-2022 Donbas.