Most other countries do not agree it is a country. They think it is "unrecognised". Only 3 other countries think it's a country. The country declared independence from Moldova on September 2, 1990. With the help of the Russian army, it defeated the Moldovan army in the War of Transnistria.
There is argument about whether it is really a country or not. The region continues to say it is independent, and acts independently over its territory with the help of peacekeeping forces from four countries.