Coehorn

A coehorn /ˈkoʊhɔːrn/ (also spelled cohorn) was a portable mortar developed in the Netherlands by Menno van Coehoorn in 1674 and in use from the seventeenth to the mid nineteenth centuries. Unlike larger, heavier mortars, the coehorn was designed to be movable by as few as four men. By the time of the American Civil War, it was in service with both armies in twelve (4.62") and twenty-four pound varieties.