\'The myth of Celtic and Roman Britain\'

[Thunder]

The concept that the Britons somehow magically repulsed the Romans, despite said Romans having punched out pretty much every other military power, including several more advanced than they (the Romans) were, using their trademark combination of treachery, military force and more military force, against all the sources and evidence and archaeology (the giant wall stretching across Northern England, for example, the various bits of mail armour, the Roman roads, the Gladii and Spathae type-swords, the numerous primary and secondary sources), is just so incomprehensibly silly that I cannot quantify it.

History is replete with lesser powers humbling great ones.

Not really. 'Stinging', yes. 'Defeating', no. The Hawians may have killed Cook, but they were soon conquered and subdued after that. History is replete with lesser powers surviving greater ones, usually by means of being hard to reach, savage resistance, having little of value to conquerers and unified, coherent resistance. Britain offered and could offer none of these things.