The 1st Royal Lancashire Militia (The Duke of Lancaster's Own) was an auxiliary regiment raised in the county of Lancashire in North West England during the 17th Century. Primarily intended for home defence, it saw active service in Ireland under King William III, as well as against the Jacobite Risings of 1715 and 1745. It spent long periods on defence duties during the wars of the 18th Century and early 19th Century, and was stationed on the Ionian Islands during the Crimean War. It later became part of the King's Own (Royal Lancaster Regiment) and saw active service in the Second Boer War. After its conversion to the Special Reserve under the Haldane Reforms, it supplied reinforcements to the fighting battalions during World War I. After a shadowy postwar existence the unit was finally