A mortar has been widely used in infantry units because of its simple structure, operational procedure, maintenance, high elevation angles, and firing rates. A large caliber mortar system is mandatory in modern battlefield to improve the survivability of crew and for a deep-strike capability. On this ground, owing to those reasons, a large number of countries have been employing mortar system. In parallel with the advances in technology, the capability of a self-propelled mortar also has been enhanced in many areas. For example, it provides field mobility, extends the range, enhances performance of projectiles, and increases the first-shot kill rates with guided projectiles. Therefore, it is urgent to develop a large caliber, self-propelled mortar system for the future battlefield. In addition, the firing control systems of mortar and artillery have been digitalized along with the advance of information technology. In this paper, we investigated the recent global trend of 120mm mortar ammunition and introduced its development status of a localized version.