The 3d Armored Division was a heavy mechanized division of the United States Army that served in World War Two, the Cold War defense of Western Europe, and the Persian Gulf War. This is a short history of the Spearhead Division, the 3rd Armored Division.

Soldiers of the 187th Infantry Regiment (Airborne) have the distinction of belonging to the only airborne regiment that has served in every conflict since the inception of American airborne forces. During their time in the Korean War, the Rakkasans were awarded a Presidential Unit Citation and two Korean Presidential Citations, as well as earning five more Battle Streamers for their flag. Three soldiers from the 187 were awarded the Medal of Honor.

The history of the 1st Infantry Division, nicknamed "The Fighting First" or "The Big Red One" after its distinctive shoulder patch, is one of the richest in the United States Army. They have provided continuous service to the country since their organization in 1917.