Mad Jack.

This is coolbert:

The British do so love their eccentrics.

"ec•cen•tric - - adj. Departing from a recognized, conventional, or established norm or pattern."

Thanks to the article from "Coffee or Die" as authored by Matt Fratus. 

"‘MAD JACK’ CHURCHILL: THE OFFICER WHO CARRIED A SWORD, BAGPIPES, AND A LONGBOW INTO BATTLE"

Jack Churchill [no relation to Winston]. Serving British army officer during the Second World War and a man of many talents and abilities.

Archer /swordsman/ romantic /military officer /bagpiper /male model /PoW escapee /motorcyclist.

"ro•man•tic - - adj.  imaginative but impractical; visionary"

Read of additional military men each and everyone a successful battlefield commander the moniker "Mad" bestowed:

* Mad Anthony Wayne.

* Mad Mike Hoare. 

*  Mad Mike Calvert.

* Mad Mitch Colin Mitchell.

Mad but not in a bad way mad.

coolbert.