Suggest they be told to bring it, and massive retaliation inflicted upon them.
Oo-rah! Usual moderate spam response - perhaps you'd like to charge ashore singing 'The Halls of Montezuma' clutching an M2 whilst dressed in bandoliers of 0.50" ammunition?
'twould be unwise to let slip the dogs of war in Korea......
...they'd only get eaten...
