What composer wrote the overture played annually at the Independence Day Eve concerts to choreograph with fireworks?
Grant Park Symphony Orchestra:  Their rendition of Pyotr Tchaikovsky's "1812 Overture" marked the culmination of the event and was choreographed to be synchronous with howitzer blasts and a crescendo of fireworks. 1812 Overture: The Year 1812, festival overture in E♭ major, Op. 49, popularly known as the 1812 Overture, is an overture written in 1880 by Russian composer Pyotr Ilyich Tchaikovsky to commemorate Russia's defence of its motherland against Napoleon's invading Grande Armée in 1812.
Pyotr Ilyich Tchaikovsky