The 1st Armored Division, nicknamed "Old Ironsides," is the oldest and most recognizable armor division in the United States Army. It was the first tank unit to see combat in World War II. Old Ironsides is still serving America as part of III Corps, stationed at Fort Bliss in El Paso, Texas. This is a short history of the 1st Armored Division.

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.

The 2nd Cavalry can trace its lineage back to the early part of the 19th century. They’ve been named Dragoons, Armored Cavalry, and Stryker Cavalry. Despite the name changes, the Regiment has the distinction of being the longest continuously serving mounted unit in the United States Army.

A Summary History of the 4th Infantry Division, whose motto is "Steadfast and Loyal," is a heavy mechanized division in the United States Regular Army. The 4th ID has a storied history from WWI, WWII, Vietnam, and Operation Iraqi Freedom. Arguably the most modernized division in the army, the 4ID is currently organized with four Brigade Combat Teams (BCT), a fires brigade, an aviation brigade, and various supporting units.