and here's more... http://stefanosskarmintzos.wordpress.com/2012/10/13/the-usage-of-capital-letters-as-shield-devices/Another widely known Spartan symbol, adopted in the 420s BC, was the letter lambda (Λ),
standing for Laconia or Lacedaemon, which was painted on the Spartans' shields.
[Sekunda (199, p. 27; disputed by Campbell (2012)]