I feel like I’m missing the joke. Would someone kindly explain it without being an a-hole about it?
It’s a historical boundary of the Hungarian empire which has occupied and lost much of this territory a few times
ohhhhh i thought it had to do with vampires because i think it has wallachia in there
No Wallachia is on the other side of the Carpathians, from the circled parts Transylvania and Partium are parts of Romania at the moment. Wallachia was occupied by Hungary for a very little time in the middle ages, and lastly in 1918 for some months: en.wikipedia.org/wiki/Treaty_of_Bucharest_(1918), quickly overturned in the Hungarian Romanian war of 1919: en.wikipedia.org/wiki/Hungarian–Romanian_War
Treaty of Bucharest (1918) - Wikipedia

A couple decades ago I read a book that made me want to go visit Târgoviște and Bucharest and i am told they are lovely.