Treaty of Lambeth

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The Treaty of Lambeth, also known as the Treaty of Kingston, was signed on an island at Kingston-upon-Thames in 1217 by Prince Louis of France, ending his campaign in the First Barons' War, and his claim to the throne of England.

When his campaign had begun, baronial enemies of the unpopular King John of England had flocked to his banner, but after John's death, and his replacement by a regency on behalf of the boy king Henry III (John's son), many had deserted to the loyalist cause. When his army was beaten at Lincoln, and his naval forces (led by Eustace the Monk) were defeated off the coast of Sandwich, he was forced to make peace under English terms.

The principal provisions of the treaty were an amnesty for English rebels, land possession to return to the status quo ante, the Channel Islands to be returned to the English crown, Prince Louis to undertake not to attack England again, and to attempt to give Normandy back to the English crown, and 10,000 marks to be given to Louis.