During World War II, it was given the nickname==''the "Bloody Bucket" ==division by German forces due to the ~~shape and color of its red keystone insignia~~'''Battle of Hürtgen Forest
'.
https://en.wikipedia.org/wiki/Battle_of_H%C3%BCrtgen_Forest
The Battle of Hürtgen Forest (German: Schlacht im Hürtgenwald) was a series of fierce battles fought from 19 September to 16 December 1944, between American and German forces on the Western Front during World War II, in the Hürtgen Forest, a 140 km2 (54 sq mi) area about 5 km (3.1 mi) east of the Belgian–German border.[1] It was the longest battle on German ground during World War II and is the longest single battle the U.S. Army has ever fought.[7]
https://en.wikipedia.org/wiki/28th_Infantry_Division_(United_States)
A special designation in the United States Army is a "nickname granted to a military organization" which has been authorized by the Center of Military History and recognized through a certificate signed by the Chief of Military History. Once approved, these designations may only be used by the officially recognized unit, or its recognized successor unit.
https://en.wikipedia.org/wiki/Special_designation