Although it was not a formal alliance, it marked an important step in the history of the two countries.
To celebrate the 120th anniversary of the Entente Cordiale, French and British troops recently participated in a symbolic gesture by swapping roles in the Changing of the Guard ceremony outside each other's palaces.
This ceremony has a long history, dating back to 1660 when the Household Troops began guarding the Sovereign and the Royal Palaces.
During the Changing of the Guard, the Old Guard hands over responsibilities to the New Guard in a ceremonial exchange.
This tradition was witnessed by dignitaries such as The Duke and Duchess of Edinburgh in London and President Macron in Paris.
The event marked a momentous occasion as it was the first time a non-Commonwealth country participated in the Changing of the Guard at Buckingham Palace.
This gesture highlighted the enduring friendship between the two nations.
Last year, The King and Queen visited France on a State Visit, their first overseas trip since their Coronation.
The visit included ceremonial welcomes and symbolic gestures, such as a joint flypast by the Red Arrows and the French Air Force at the Arc de Triomphe.
During a State Banquet at the Palace of Versailles, The King emphasized the significance of the Entente Cordiale in today's world.
He highlighted the deep connections between the two nations and called for a renewed effort to strengthen their friendship in the face of 21st-century challenges.
To view His Majesty's full speech, please follow this link.