The 284th Field Artillery Battalion was activated on June 25, 1943, during World War II, formed from cadre men of the 27th Infantry Division. Its history lies with the new organization, but its cadre came from veteran units like the 249th, 104th, and 105th Battalions. The acronym "DUI w Br - Ribbon X 300" is not standard military terminology, but DUI likely refers to a Device or Insignia, and "w Br" could stand for "with Bronze," while "Ribbon X 300" might relate to a specific award, mission, or 300th anniversary, as many military awards are associated with a particular campaign ribbon or are awarded for service.