The Bashi-Bazouks(leaderless) were mercenary troops of the Ottoman empire.
I find some example paintings about bashi-bozouk. The paintings had done by one of the most important oriantalist painter Jean Leon Gerome...
Bashi-Bozouk Chief:
http://www.the-athenaeum.org/art/display_image.php?id=32684
Bashi-Bozouk Singing:
http://www.the-athenaeum.org/art/display_image.php?id=32604
An Bashi-Bozouk and his dog:
http://www.the-athenaeum.org/art/display_image.php?id=32646
A black Bashi-Bozouk:
http://www.the-athenaeum.org/art/display_image.php?id=32602