Calling all armchair generals! Boudica's Last Stand.

[Nathan Ross]

an inability to read and understand a primary source.

I believe in this case the misunderstanding is yours: he did not, as you claim, "put 17 days grain into the forts leaving the legion to starve and they mutiny".

Read the text again and you will see that he took 17 days full ration with him, and only allocated a portion of that to the forts. The troops complained but neither starved nor mutinied, and the campaign was a success.

This demonstrates that ancient logistics were considerably more flexible, and effective, than the rigid arithmetic of modern military analysis might have us believe.

mules require a rest day every 7, a Roman rested every 3 to 4 days when marching

Where are you getting this from?

Mules can work for twenty days in rough terrain without rest.

Roman troops marched five hours a day and rested the remainder. Infantry General William B Hazen, in a well-known anecdote, claimed that infantry could outmarch cavalry after seven days on the road (campaigning in the arid regions of the US southwest). If American infantry could march across arid country for more than seven days without rest, what leads you to believe that trained Roman troops could not?