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Kanbei's Error? is the eleventh mission of the Advance Wars campaign. It is the last mission in which you will face Kanbei. Clearing this mission in 12 days is the third step to obtain three additional secret missions; in doing so you will unlock Kanbei for The Final Battle! and make Sonja available for purchase in Battle Maps after clearing the campaign.

Kanbei's Error?
Kanbei's Error.png
Mission Info
Game Mode Campaign
Term(s) Capture
Weather Clear
Fog of War In Advance Campaign only
Commanding Officers
CO 1 Andy, Max or Sami
CO 2 Kanbei


Before the mission, a conversation Kanbei and Sonja have has Sonja tell her father that he should have as many bases as Orange Star; before she can add more, Kanbei rushes off to battle again.

Although Kanbei does have a base in this mission, it is situated in a horribly useless location; something the Orange Star COs, and Kanbei himself, recognize after the mission.

The next mission is Divide and Conquer! if you have defeated the last three missions in 8, 10, and 12 days respectively; otherwise the next mission is Captain Drake!.


Perfect Rankings

  • Speed: 9 days or less
  • Power:
  • Technique:


  • Speed: 11 days at most
  • Power:
  • Technique:


  • This mission is the source of two infamous lines of dialogue: "What's an airport, again?" and "Kanbei shall deploy a mountain of troops!". Both quotes are minor inside jokes in the Advance Wars community.