Tweet of the Day: 1965 1st Cav Division Reflagging in the ROK

So… Did they just change the name or also the organization?

I never had the opportunity to go through such a change.

Found part of the answer I was looking for on history.army.mil:

Since World War II the Army has effected approximately two dozen division reflagging actions (see Appendix A). In each instance division elements were reflagged along with the division headquarters. The first such action in the active Army occurred in 1950 when the 6th Infantry Division replaced the 4th Infantry Division in the training base at Fort Ord, California, so that the 4th could be used as a combat division. In 1954, after the Korean War, four National Guard divisions that had been called to active duty were reflagged by four active Army divisions so that the Guard organizations could return to state control. In 1965, when the 1st Cavalry Division was chosen to become the Army’s first airmobile division, the 2d Infantry Division and elements of the 11th Air Assault Division at Fort Benning, Georgia, were reflagged as the 1st Cavalry Division, which then deployed to Vietnam. The 1st Cavalry Division, then serving in Korea, was in turn reflagged as the 2d Infantry Division, and the 11th was inactivated. After the war in Vietnam, another round of divisional reflaggings took place: the 5th Infantry Division at Fort Carson, Colorado, was reflagged as the 4th Infantry Division; the 1st Armored Division at Fort Hood, Texas, was reflagged as the 1st Cavalry Division; the 4th Armored Division in Germany was reflagged as the 1st Armored Division; and the 24th Infantry Division at Fort Riley, Kansas, was reflagged as the 1st Infantry Division.

“Appendix A” is at https://history.army.mil/books/Lineage/reflag/appA.htm