 6062 Battering Ram featured the Black Falcons defending a castle wall section from a Crusader siege, implying armed conflict between these two sides.Sets such as 6060 Knights' Challenge and 1584 Knight's Challenge suggested that the Lion Knights had a respected sporting rivalry with the Black Knights; indeed for 1990 and 1991 the Crusaders were merged with the Black Knights in a combined "Castle" faction (the catalogue combined the lion and wyvern motifs) that was pitted against the Forestmen, analogous to the legend of Prince John's knights against Robin Hood and his Merry Men outlaws.However in 1992 which was their final year of release, the Crusaders reverted to their own faction when the Black Knights were formally launched.