Daniel Butterfield

Daniel Adams Butterfield (October 31, 1831 – July 17, 1901) was a New York businessman, a Union General in the American Civil War, and Assistant U.S. Treasurer.
After working for American Express, co-founded by his father, Butterfield served in the Civil War, where he was soon promoted brigadier general, and wounded at Gaines' Mill. While recuperating, he either wrote or re-wrote a popular bugle-call for burials, called Taps. He commanded a division at Fredericksburg, and then became Hooker's chief of staff, sharing both the credit for improved morale and responsibility for the licentious behaviour that Hooker tolerated in camp. He also became embroiled in Hooker’s political feuds with Burnside and Meade. Wounded at Gettysburg, he served in Sherman’s Atlanta campaign, before retiring from front-line service through illness. He later received the Medal of Honor.
In Grant’s administration, he was Assistant Treasurer of the United States, abusing that position to manipulate the price of gold, and being forced to resign. He then resumed his business career. Butterfield’s extensive war archives are displayed at Cold Spring, New York.
While the Union Army recuperated at Harrison's Landing, Virginia, from its grueling withdrawal during the Seven Days Battles, Butterfield experimented with bugle calls and is credited with the composition of "Taps". He wrote "Taps" to replace the customary firing of three rifle volleys at the end of burials during battle. "Taps" also replaced Tattoo, the French bugle call to signal "lights out". Butterfield's bugler, Oliver W. Norton of the 83rd Pennsylvania Volunteers, was the first to sound the new call. Within months, "Taps" was played by buglers in both the Union and Confederate armies.
https://en.wikipedia.org/wiki/Daniel_Butterfield