Hackle
As a fusilier regiment, the RRF wears a hackle, which in this case is the hackle of the Royal Northumberland Fusiliers, red over white. This distinction was originally a white plume which His Majesty's Fifth Regiment of Foot had taken from the head dress of fallen French troops at St. Lucia in December 1778. The Fifth Regiment of Foot became His Majesty's Fifth (Northumberland) Regiment of Foot with the county affiliations of 1782. In 1829 King George IV ordered the white plume to be worn by all infantry regiments, and in order not to take away from the Fifth (Northumberland) Regiment of Foot's battle honour, their plume was distinguished by being made red over white. This came from the legend that the men of the Fifth (Northumberland) Regiment of Foot having dipped the white plumes in the blood of the French at St. Lucia. The Fifth (Northumberland) Regiment of Foot did not become the Fifth Regiment of Foot (Northumberland Fusiliers) until 1836, later in 1881 they became The (Fifth) Northumberland Fusiliers and finally in 1935 The (Fifth) Royal Northumberland Fusiliers.
Read more about this topic: Royal Regiment Of Fusiliers