Since the United States didn't exist yet, Bandit Keith wears a Union Jack on his head.
The entire game can be this since the Yu-Gi-Oh characters represent actual historical figures.
The final battle of the Lancaster storyline involves Seto being a Graceful Loser... or so it seems.
Seto: Well done, Duelist... I may have lost, but my heart sings with the joy of having faced you in battle. T'was a duel to be remembered. I take great pride in the fact that I fall by your hand... And if you believe that, I'll sell you some swampland in the outer reaches of the realm!
Seto's plan to summon DarkNite hits a snag when he summons his brother, Manawyddan fab Llyr, instead.