Romania was not conquered in WW 2; Romania was occupied by Soviet Union after a disastrous armistice.
Romania was not invaded by Germany in WW 2; Romania was an ally of Germany.
Yes, for example: WW 1 , WW 2.
Because Soviet Union defeated Romania in WW 2.
Yes, during the WW 2 USA attacked Romania.
Because Soviet Union defeated Romania in WW 2.
In 1916-1918, during the first world war; during WW 2 Romania and Germany were allies.
20th century: 2nd Balkanic war, WW I, WW II
1. The old name was Dacia.2. The Romans did not use the name Romania for the conquered territory.
Romania was occupied by Germans from the end of 1916 to the 1918, in WW 1.
Difficult to answer: probably stolen by Russians (together with the integral treasury of Romania, during the WW I).
WW 1 and WW 2; see the link bellow for the Romanian history.
1. Romania was not discovered. 2. During the history the Romanian territory was conquered or only attacked by Romans, Byzantines, Goths, Slavish tribes, Bulgarians, Mongols, Tatars, Hungarians, Germans, Austrians, Cumans, Pechenegs, Ukrainians, Polish etc. Do you see, it is a very difficult history.