On November 4, 1990, the 4th Battalion, 27th Field Artillery was deployed to defend Saudi Arabia from Iraqi invasion as part of Operation Desert Shield in late December 1990. When the defense of Saudi Arabia mission gave way to the liberation of Kuwait, 4-27 FA provided extensive fire support for the 1st Armored Division. During the ensuing 96 hours of Operation Desert Storm, the battalion unleashed major bombardments with their 27 M270 MLRS launchers against Iraqi forces.