[Rory is sleeping. Lorelai walks in and sits on her bed.]
RORY: What? What is it?
LORELAI: Oh nothing. Whatcha doing?
RORY: Taking back Poland.
LORELAI: Oh, good luck with that.
Poland was invaded in September 1939 by Germany and the Soviet Union, marking the beginning of World War II. The campaign ended in October 1939, when Germany and the Soviet Union divided the country between them – Germany annexed the west, and the Soviets the east.
Rory’s sleepily sarcastic reply suggests that she may have been studying World War II in History class the previous semester.