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As the tin says, the AHC/WI is for Louis Bonaparte to remain as King of a remaining Kingdom of Holland after Napoléon is dethroned in France. Louis was quite well liked by his Dutch subjects and so it would be more a matter of convincing the Great Powers to let him reign.
Maybe he refuses his brother’s order to abdicate and turns on Napoléon? He might be forcibly dethroned but after the war he could regain the throne perhaps?
If that’s the case what happens with the House of Orange-Nassau? Maybe they are given OTL Belgium instead of it being given to Holland?