The Ordnance QF 4.5-inch is a British artillery piece developed during World War II. It was designed for use by the Royal Artillery and served primarily as a field gun. The weapon was capable of firing high-explosive shells and was known for its versatility and effectiveness in various combat situations. This artillery piece was mounted on vehicles and towed by trucks, making it mobile on the battlefield. The QF 4.5-inch was used in several conflicts, including the Korean War and Malayan Emergency, and remained in service for many years due to its reliability and performance.