Final answer:
Military and civilian personnel must have CDL-like training to operate Government Motor Vehicles with a capacity of 26,001 pounds or more, reflecting the significance of handling large military vehicles safely.
Step-by-step explanation:
All military and civilian personnel operating Government Motor Vehicles (GMVs) with a capacity of 26,001 pounds or more must have CDL-like training. This is to ensure that they are adequately prepared to handle the larger vehicles safely and in compliance with regulations.
The mention of vehicles such as the McLaughlin Buicks in Grace's diary and the LibreTexts on the mass production of military vehicles, including jeeps and liberty ships, underscores the importance of such training during times when these resources are critical for wartime efforts and operations.