Cap badge, other ranks, 4th (Royal Irish) Dragoon Guards, 1900 (c)

White metal and brass badge in the form of an eight-pointed star of St Patrick. In the centre, there is a shamrock with three crowns over a cross within a circlet bearing the regimental motto, 'Quis Separabit' (Who shall separate us), and 1783 in Roman numerals (MDCCLXXXIII). The brass scroll below the star bears the abbreviated regimental title, '4th Royal Irish D. Guards'.

This cavalry regiment was raised in 1685. It fought in many British Army campaigns including the Peninsular War (1807-1814), the Crimean War (1854-1856), Egypt (1882) and on the Western Front during World War One (1914-1918). In 1922 the regiment was amalgamated with the 7th Dragoon Guards to form the 4th/7th Dragoon Guards.