British "Brown Bess" musket used in Napoleonic Wars (1799-1815)

Brown Bess is a nickname of uncertain origin for the British Army's Land Pattern Musket and its derivatives. This musket was used in the era of the expansion of the British Empire and acquired symbolic importance at least as significant as its physical importance. It was in use for over a hundred years with many incremental changes in its design. These versions include the Long Land Pattern, Short Land Pattern, India Pattern, New Land Pattern Musket, Sea Service Musket and others.

The Long Land Pattern musket and its derivatives, all .75 caliber flintlock muskets, were the standard long guns of the British Empire's land forces from 1722 until 1838 when they were superseded by a percussion cap smoothbore musket. The British Ordnance System converted many Flintlocks into the new Percussion system known as the Pattern 1839 Musket. A fire in 1841 at the Tower of London destroyed many muskets before they could be converted. Still, the Brown Bess saw service until the middle of the nineteenth century. Some were still in service during the Indian rebellion of 1857, some were used by Zulu warriors who had purchased them from European traders during the Anglo-Zulu War in 1879, and some were sold to the Mexican Army who used them during the Texas Revolution of 1836 and the Mexican-American War of 1846 to 1848. One was even used in the Battle of Shiloh in 1862.

Most male citizens of the American Colonies were required by law to own arms and ammunition for militia duty. The Long Land Pattern was a common firearm in use by both sides in the American Revolutionary War.