The 1812 Overture is a concert overture in E♭ major written in 1880 by Russian composer Pyotr Ilyich Tchaikovsky. The piece commemorates Russia's successful defense of the French invasion of the country by Napoleon in 1812. The overture debuted in Moscow on 20 August 1882, conducted by Ippolit Al'tani under a tent near the then almost finished Cathedral of Christ the Saviour, which also memorialized the 1812 defense of Russia. The fifteen-minute overture is best known for its climactic volley of cannon fire, ringing chimes, and a brass fanfare finale.
The piece begins with the simple, plaintive Russian melody of the Eastern Orthodox Troparion of the Holy Cross known as "O Lord, Save Thy People". This represents the Russian people praying for a swift conclusion to the invasion. Then, the French national anthem, "La Marseillaise", is heard, representing the invading French army. Then, the melody of "La Marseillaise" is heard competing against Russian folk music, representing the two armies fighting each other as the French approached Moscow. At this point, five cannon shots are heard, representing the Battle of Borodino. This is where "La Marseillaise" is most prominent, and seems to be winning. After this, a long descending run represents the French army retreating out of Moscow as the freezing winter winds rage on. At the end of this run the opening motif is repeated, which can be interpreted as prayers being answered. The grand finale culminates with eleven more cannon shots and the melody of "God Save the Tsar!".
As a rousing patriotic hymn, the Overture has subsequently been adapted into and associated with other contexts than that of the Russian resistance to Napoleon's invasion. The 1812 Overture is popularly known in the United States as a symbol of the United States Independence Day, a tradition that dates back to a 1974 choice made by Arthur Fiedler for a performance at the Boston Pops July 4th concert.