sentences:  However, Edward's military operations, limited though they were, were still of assistance in persuading the Mamluk leader Baibars to agree to a 10-year truce between the city of Acre and the Mamluks, signed in 1272.Edward's efforts were described by historian Reuven Amitai as "the nearest thing to real Mongol-Frankish military coordination that was ever to be achieved, by Edward or any other Frankish leader.