This list catalogues mortars which are issued to infantry units to provide close range, rapid response, indirect fire capability of an infantry unit in tactical combat.[1] In this sense the mortar has been called "infantryman's artillery", and represents a flexible logistic solution[clarification needed] to satisfying unexpected need for delivery of firepower, particularly for the light infantry.[2] In general infantry mortars are defined by what a team of infantrymen, sometimes known as mortarmen, can transport unaided by significant vehicle support. Because of this intrinsic restriction mandated by weight, mortars are only considered "infantry" to a calibre of 120mm. These larger weapons usually require wheeled assemblies to allow their towing either by hand or by light tactical vehicles.