the majority of shoulder-arms remained smoothbore muskets. Pattern 1853 The Pattern 1853 Enfield used a smaller .577 calibre Minie bullet. Several variations were made, including infantry, navy and artillery versions, along with shorter carbines for cavalry use. The Pattern 1851 and Pattern 1853 were both used in the Crimean War, with some logistical confusion caused by the need for different ammunition. The Pattern 1853 was popular with both sides of the American Civil War; the Confederacy and the Union imported these through agents who contracted with private companies in Britain for production. Pattern 1858 The Pattern 1858 naval rifle was developed for the British Admiralty in the late 1850s with a heavier 5-grooved barrel. The heavier barrel was designed to withstand the leverage from the naval cutlass bayonet, but may have contributed to accuracy. Pattern 1858 Indian Service There is also the very short-lived Pattern 1858 developed from the Pattern 1853 for Indian service. A consequence of the rebellion, based on British fears, was to modify the native infantry long arms by reaming out the rifling of the Pattern 1853 which greatly reduced the effectiveness, as was replacing the variable distance rear sight with a fixed sight. This became the Pattern 1858, with an increased bore of 0.656" from 0.577" and a thinner barrel wall. Bulging and bursting of the barrel became an issue, as well as excessive flexing when the bayonet was fitted. To remedy this, new barrels were made with a thicker wall and became the Pattern 1859. Pattern 1859 Indian Service (modified) The Indian Service variant became the new standard issue and, when comparing the P1859 with the P1853, side-by-side, the difference would only become apparent if one was to feel just inside the muzzle for the presence of rifling or not. The British retained the superior earlier pattern for their own use. Pattern 1860 The Enfield "Short Rifle" was a percussion rifle used extensively by the North and South in the US Civil War. It was generally well regarded for its accuracy, even with its short barrel. It was also used by the British Army. Pattern 1861 Enfield Musketoon The Pattern 1861 Enfield Musketoon was an alteration to the Pattern 1853 Enfield Musketoon. The alteration gave the Pattern 1861 a faster twist, which gave it more accuracy than the longer Pattern 1853 Enfield rifle. In England, it was issued to artillery units, who required a weapon