A historical question about “The Brothers Karamazov”
In one scene of the book, a manic Dmitri visits Grushenka in a tavern where she sits drinking with Russian and Polish men. Dmitri first raises a toast of champagne to Poland, which the Poles happily drink to. The he proposes a toast to Russia, which they initially refuse. Then, Vrublevsky raises his glass and says “To Russia as she was before 1772!”, which the Poles agree to drink to. Dmitri is angered by this and calls them all fools.
What happened between Poland and Russia around the 1770s that would have caused this tension?