Benjamin Thompson was a scientist and former loyalist American officer who served as Lt. Colonel in the King's American Dragoons. After the war he moved to Great Britain, receiving a knighthood from King George III. He later moved to Bavaria where he was appointed Minister for the Army. He reorganised the army and introduced a new uniform. Thompson's service to the Bavarian state resulted in his ennoblement in 1791 with the title Reichsgraf von Rumford.
The uniform was apparently never especially popular with the troops, as it was found to be uncomfortable and not especially hard wearing. Thompson/Rumford is far better known as a scientist, particularly thermodynamics. He was a prolific inventor and among his achievements was the invention of the coffee percolator for use by the Bavarian army and improved more efficient chimneys for domestic heating. He even has a crater on the moon named after him.