Moldova and Romania — no more lies
The nowadays Republic of Moldova is pretty much the historic region of Bessarabia, which belonged for a long period of time to the Romanian state, being taken first in 1812, when the Russian Field Marshal Mikhail Kutuzov signs the Treaty of Bucharest, ending the Russo-Turkish War, 1806-1812 and annexing Bessarabia to Imperial Russia.
When the Russian Empire broke down, the region has chosen to reintegrate with Romania. In the aftermath of the WWII the region has been annexed by USSR. Following the declaration of independence, signed on 27th of August, 1991, the Republic of Moldova has chosen to remain so until now.
The reunification with Romania is widely discussed, but the Parties that promote it tend to get about 10% of the votes. Romania has made no official claim on any form of union with Moldova, though many Romanian Parties tend to launch populist declarations on this issue, as many of the citizen of the Republic of Moldova have also the citizenship of Romania.