Direct proof of use
The ATS-59-122 is documented in the 2014 Yemen Civil War through Oryx's September 2015 inventory of pre-war Yemeni fighting vehicles. Oryx stated that its list covered equipment in Yemeni Army service before the 2014-2015 Houthi takeover and was meant to clarify what military equipment was available to Yemeni battlefield parties, then listed the 122 mm ATS-59-122 under self-propelled artillery.
That evidence supports the vehicle as former Yemeni Army self-propelled artillery available in the war after the takeover. It does not, by itself, identify a named unit, a specific front, or a dated firing incident involving an ATS-59-122.
Sources: Handbook Of Pre-War Yemeni Fighting Vehicles
Timeline
The conflict context begins with the Houthi takeover period in 2014 and 2015, when former Yemeni state military stocks became part of the battlefield equipment picture. The ATS-59-122 evidence enters the public record on September 20, 2015, when Oryx published the vehicle in its pre-war Yemeni Army inventory.
Later background references help identify the conversion rather than add separate combat incidents. Klüser identifies ATS-59-122 as a Yemen-origin ATS-59 vehicle with a D-30 122 mm gun, while Tank Encyclopedia places Yemen among countries that mounted 122 mm artillery on ATS-59G chassis.
Sources: CFR Yemen and Red Sea Tracker, Handbook Of Pre-War Yemeni Fighting Vehicles, Modelling vehicle history - ATS-59-122, Egyptian ATS-59G 122 mm MLRS
Narrative
In Yemen, the ATS-59-122 is best treated as a small, source-limited artillery conversion rather than a well-documented serial self-propelled gun. The vehicle combines an ATS-59-family tracked artillery tractor with a 122 mm D-30-type gun, giving it a battlefield role as improvised tracked tube artillery fire support.
The side attribution follows the inventory context and the conflict's equipment flow after the Houthi takeover: the parent catalog row assigns the weapon to Houthi-aligned forces because former Yemeni Army equipment became available to battlefield parties under Houthi and allied control. The public sources reviewed for this detail page support availability and identification more strongly than they support a granular operational history.
The ATS-59-family chassis context explains why the conversion is plausible in Yemen's wider artillery record. WeaponSystems.net describes the ATS-59G as an unarmored tracked artillery tractor with a 300 hp diesel engine, while Tank Encyclopedia notes that the ATS-59G was used with tube artillery such as the 122 mm D-30 and became a platform for self-propelled artillery conversions.
Sources: Handbook Of Pre-War Yemeni Fighting Vehicles, Modelling vehicle history - ATS-59-122, ATS-59G, Egyptian ATS-59G 122 mm MLRS
