On 24 Aug 1217 Hubert de Burgh Count Mortain 1st Earl Kent (age 47) commanded the King's forces at Sandwich, Kent [Map] during the Battle of Sandwich aka Dover. French re-enforcements had left Calais to join with the future Prince Louis's (age 29) forces who were in short supply following the Second Battle of Lincoln. Hubert Burgh's men routed the French ships. The battle marked the end of Prince Louis's (age 29) invasion with the Treaty of Kingston aka Lambeth being signed shortly afterwards.

In Sep 1217 Treaty of Kingston aka Lambeth was agreed by Louis "Lion" VIII King France (age 29) in which he renounced his claim to the English throne, gave an amnesty to English rebels and acknowledged the Channel Islands as being part of the Kingdom of England.