This video covers the California Army National Guard's 40th Armored Division during the late 1950s. You'll learn the U.S. Army Armored Division's organization pre- and post-Pentomic, how the unit conversions were handled in the 40th Armored Division specifically (which was also an Infantry Division before 1954), and the geographical extent of the division across Southern California.
Here is the 40th Armored Division's post-Pentomic and post-CARS configuration from July 1959:
Here is the 49th Infantry Division's post-Pentomic and post-CARS configuration from March 1960:
