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1217 Treaty of Lambeth


The Treaty of Lambeth of 1217, also known as the Treaty of Kingston to distinguish it from the Treaty of Lambeth of 1212, was a peace treaty signed by Prince Louis of France in September 1217 ending the campaign known as the First Barons' War to uphold the claim by Louis to the throne of England. When the campaign had begun, baronial enemies of the unpopular John, King of England had flocked to the French banner, but after John's death in 1216, and his replacement by a regent, William Marshall, on behalf of the boy king Henry III, many had moved to the English side. Subsequent defeats at Lincoln in May 1217, at Dover and Sandwich in August 1217 forced Louis to negotiate.

Information on the treaties is based on three early documents but none of these is known to have been based on an original manuscript. It is known that negotiations were spread over several locations, opening on 6 September 1217 at Staines, because the royal court was nearby at Chertsey or possibly on 5 September on an island of the Thames near Kingston. Various dates for treaties are given by the sources including:

Whatever documents were actually signed during September, Louis left England for the last time from Dover on 28 September. The principal provisions of the treaties were an amnesty for English rebels. It was also acknowledged that the French had failed to take possession of the entire Channel Islands and so possession of the individual islands was restored to the King of England. Prince Louis undertook not to attack England again and agreed he had never been the legitimate king of England, in exchange for 10,000 marks. Scottish troops under Alexander II also withdrew.


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