The "4th Division" typically refers to a military unit that is part of a larger army structure. It can be found in various countries, including the United States Army and British Army. Each 4th Division has its own history, structure, and operational focus, often participating in significant military campaigns and exercises. In the U.S. Army, the 4th Infantry Division, known as the "Ivy Division," is based at Fort Carson, Colorado. It has a storied history, having served in both World Wars and more recent conflicts. The division is recognized for its combat readiness and versatility in various operational environments.