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.
|Fog of War||In Advance Campaign only|
|CO 1||Andy, Max or Sami|
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!.
- Speed: 9 days or less
- Speed: 11 days at most
- 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.