This question Why do the Japanese sing Ode to Joy during the Japanese New Year?
brings another similar one. I live in a small US Midwest town, and every year they celebrate the Independence day (4th of July) by open air performance of Tchaikovsky's Overture "1812". My question is "why"? What is the story behind this? Local residents whom I asked could not answer.
Some Americans might think that it has a relation to their last war with England (1812). But it has none. It was written to commemorate the Russian victory over Napoleon in the same year, has motives of the partiotic song "God save the Tsar", and it uses a unique "musical instrument" a real cannon salute in the end (performed by the local National Guard howitzer battery).
EDIT. Besides "God save the Tsar", there is an additional irony: Tchaikovsky celebrates the defeat of the French, who were American allies in the Independence war. La Marseillaise is also cited in this Overture, but "God save the Tsar" wins in the end, of course.