J.J. Corry 'The Battalion' is the world's first Irish whiskey produced using tequila and mezcal casks for maturation and finishing. The expression is a blend of aged grain and malt Irish whiskeys that have been transferred into ex-tequila and ex-mezcal casks to mature, integrating the herbaceous agave character of the Mexican spirit vessels with the underlying Irish whiskey base. The name honours the San Patricio Battalion — an Irish-born unit that defected from the United States Army to fight for Mexico in the Mexican-American War of 1846–1848 — a deeply Irish-Mexican historical connection that inspired the tequila and mezcal cask programme. Bottled at 50% ABV.

J.J. Corry Irish Whiskey was founded in 2015 by Louise McGuane on the McGuane family farm in Cooraclare, County Clare, Ireland, reviving the historic Irish practice of whiskey bonding — in which a bonder sources new-make spirit from distilleries, matures it in their own warehouses, and releases it as their own expression. The brand is named after J.J. Corry, a celebrated 19th-century whiskey bonder from County Clare. McGuane is widely credited as Ireland's first modern whiskey bonder and the first woman to found an Irish whiskey house. Whiskey is sourced from Irish distilleries and matured in a purpose-built bonded rackhouse on the McGuane farm.