Prior to World War One, this country included the former principality of Wallachia.
Identify the country expected to have been invited to join NATO at this week's summit in Prague from historical clues on a 5-5-10-10 basis.      A. Prior to World War One, this country included the former principality of Wallachia. After the war, it gained Transylvania, as well as other lands from the defeated Austro-Hungarian Empire.
Identify the country expected to have been invited to join NATO at this week's summit in Prague from historical clues on a 5-5-10-10 basis.      
{Romania}