During the history these countries were occupied sometimes by Russians.
Five countries border Romania. They are Bulgaria, Serbia, Hungary, Ukraine and Moldova. Romania also has a coastline on the Black Sea.
Romania was an ally of Germany and fight against Soviet Union to free Romanian territories occupied by Russians.
Romania wanted Transylvania (from Austria-Hungary) - and got it at the end of the war.
Romania wanted to free Romanian territories occupied by the Russians in June 1940, after the Ribbentrop-Molotov pact.
The Austro-Hungarian and the Germany armies occupied the most part of Romania, excepting Moldova.
Germany! I presume you mean in WWII. Germany occupied parts of France, Italy, Yugoslavia, Hungary, Poland, Romania, Greece, and possibly others I have forgotten.
Hungary is on the west of Romania.
Well, firstly, there are no such people as Carpatho-Russians. Carpathic region is divided between Ukraine, Romania, Hungary and Slovakia. No, Slavs living in Carpathic regions are the Ukrainians and the Slovaks.
the way Hungarians were treated in those countries
Hungary is placed in the north-west of Romania.
a) Moldova: province in the East of Romania b) Republic of Moldova: independent country at the East of Romania. Ethnically, historically and linguistic this country is also a part of Romania but was occupied by Russians after the world war II. In English we say "Moldavia" for the province/region in Romania, and (The Republic of) "Moldova" for the newly founded country.