Since the 1960s, the 2nd Infantry Division has been responsible for defending South Korea against potential invasion from North Korea. This is the History of the 2nd Infantry Division - the Warrior Division.

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.