The Royal Highland Fusiliers (Princess Margaret's Own Glasgow and Ayrshire Regiment) 21st, 71st, 74th.

The Regiment was formed on the 20th January 1959 by the amalgamation of The Royal Scots Fusiliers and The Highland Light Infantry. Recruits are drawn from the City of Glasgow and Ayrshire. HRH Princess Margaret is the Colonel in Chief.

The RSF were raised in 1678. Originally known as The Earl of Mar's Regiment, they had several name changes over the years: - Scots Fusiliers, 21st Royal North British Fusiliers, and finally Royal Scots Fusiliers.

The HLI were raised in 1777 as the 73 (Lord McLeod's) Highlanders, were renumbered 71st in 1786, and became the 71st Highland Light Infantry in 1809. Meanwhile the 74th Highland Regiment raised in 1787, had a separate existence until 1881 when it was amalgamated with the 71st to become the Highland Light Infantry.

The Regiment and its forebears have fought in most of the major campaigns over the years and carries more than 120 Battle Honours on its colours from Blenheim (1704) to The Gulf (1991).