Chopin's etudes:Op. 10 No. 12and Op. 24 No. 12
Wow... I listen to it over and over again, nationalistic feeling...Most nationalistic music ever...Makes me more nationalistic on my taiwanese heritage.
I take it you mean op.25? 25/12 is nicknamed the Ocean etude (not by Chopin, though). If you just mean it's revolutionary, that could probably be said for the set as a whole.
Chopin composed both 10/12 and 25/12 after hearing about the revolution in Warsaw...
Or so the story goes...