This line represents the Confederate Irish as well as their Redshanks mercenaries who fought to establish independence in Ireland during the period of the English Civil War, which eventually placed them in the odd position of being Royalists. It begins with the Rebellion of 1641 and ends ten years later with the final defeat of an Irish field army, at the Battle of Knocknaclashy. Many Irishmen had fought in the Spanish tercios in the interminable wars in the Netherlands and had some military experience, but modern weapons were sometimes in short supply, and as such some Irish armies contained many troops fighting in traditional fashion, with the javelin.
Khurasan Miniatures have released several packs of 15mm English Civil War Confederate Irish and Scot figures. From their website: