Direct proof of use
The M933-series mortar projectile appears in the 2014 Russia-Ukraine War through documented Ukrainian use of the M933A1 120 mm high-explosive mortar cartridge. Militarnyi reported on 20 December 2023 that Ukrainian forces were using U.S.-made M933A1 120 mm mortar rounds fitted with M783 electronic point-detonating/delay fuzes.
A 2025 Bomb Techs Without Borders ammunition-identification guide for Ukraine also lists the 120 mm M933A1 in its Ukraine-focused mortar ammunition section and separately lists the M783 among point-detonating fuzes. That guide corroborates the ammunition type's presence in the Ukraine ordnance environment, while the Militarnyi report is the direct source for use by Ukrainian forces.
Sources: Militarnyi M783 fuzes with M933A1, Sappers Basic Identification of Ammunition in Ukraine v9
Timeline
The M933A1 entered U.S. production-and-deployment status before the war: the U.S. Army portfolio book lists a July 2008 materiel-release date and describes the cartridge as a 120 mm high-explosive round for M120A1 and M121 mortar systems.
The conflict-specific public milestone is December 2023, when Ukrainian use of M933A1 rounds with M783 fuzes was reported. The available public sources do not establish a first delivery date, a first firing date, or a specific Ukrainian unit for the M933A1.
Sources: PEO Ammunition 2017 Portfolio Book, Militarnyi M783 fuzes with M933A1
Battlefield role
In Ukrainian service, the M933A1 is documented as heavy mortar ammunition for indirect fire rather than as a separate weapon system. General Dynamics Ordnance and Tactical Systems describes the cartridge as designed for the M120 towed 120 mm mortar and M121 carrier mortar systems, with a 200 m to 7,200 m range envelope and M783 point-detonating/delay fuze.
The same manufacturer sheet states that the cartridge is intended for personnel, bunker, and light materiel targets. Those technical target categories describe the round's design role; the public conflict-use sources checked for this page do not tie an M933A1 firing to a named Ukrainian battlefield location or a specific target struck.
Sources: 120MM M933A1 HE, Militarnyi M783 fuzes with M933A1
