In most of these examples the seems to be related to the "typical the" (see above, 14.2), denoting the excellent specimen.

15.1s. In quite modern language the may still be used in exhortations: Graves Goodbye 150 Their last words were the battalion rallying-cry: Stick it, the Welsh! I ib 351 the signal for the outbreak was the cry: 'Come on, the Bolsheviks.'- Christophersen p. 191 further quotes two examples from the Manchester Guardian.