

I think the math checks out for this graph.
If a human on a bicycle consumes 0.15 calories per gram per kilometer, then a 100 kg person would be:
100000g x 0.15 calories = 15,000 calories = 15kcal
I’m guessing these numbers are for a racing bike on a flat stretch of smooth road where you don’t need to brake or accelerate.











Also- The Gulf of Tonkin incident used as a pretext for the USA going into Vietnam was a fabrication.
To be clear, there had been a scuffle involving US ships on Aug 2nd, 1964 - but it was not a deliberate attack by the North Vietnamese.
The supposed attack on Aug 4th did not happen.