Poles are unique ;D
We're a bit like every Slavic nation, I guess...
There's this traditional friendship between Poland and Hungary:
youtube.com/watch?v=_YJVO6jPaR0
So I guess we're a bit similar.
And the Slovaks, as convex wrote - Slavs, similar language, Catholics...
(but I'm just guessing - I don't know any Slovaks or Hungarians, strangely enough)
On the other hand, they were allied with the Nazis
Actually judging by what I've read Hungary was better for Poland as an enemy cooperating with the Nazis then the Soviet Union as an "ally" fighting the Nazis, ironically...
and took part in every partition of Poland...
I think some Poles helped Hungarians during the uprising of 1848.
Scandinavians, Finns (...) Dutch
lol