Direct proof of use
T-55-family tanks are documented in the 2014 Yemen Civil War through reports of Yemeni T-55M1 and T-55AM1 vehicles in combat areas after the Houthi-Saleh takeover of state military stocks. ArmedConflicts.com describes a destroyed T-55M1 near Taiz University after Yemeni National Army forces captured the area from rebel Houthis on April 8, 2016, and states that at least two T-55M1 tanks were delivered to Yemen and later participated in the Yemeni Civil War.
The same source directly ties the type to Houthi-aligned battlefield use, while Oryx's pre-war vehicle handbook identifies T-55, T-55A, T-55AM1, and T-55AM2 tanks among Yemeni Army fighting vehicles available before the 2014-2015 takeover. The West Point CTC study explains the mechanism by which Ansar Allah absorbed brigade sets of tanks, artillery, and anti-aircraft weapons as it seized the capital and state arsenals.
Sources: ArmedConflicts T-55AM1, Oryx Pre-War Yemeni Fighting Vehicles, CTC Houthi War Machine
Timeline
In 2014 and 2015, Houthi-aligned forces moved from insurgent control of northern areas into control of Sana'a and wider state military assets. CTC describes this as the absorption of brigade sets of tanks and other heavy weapons during the takeover period, giving Ansar Allah access to systems that had belonged to the Yemeni state.
By September 2015, Oryx listed T-55-family tanks in the pre-war Yemeni Army vehicle pool and framed the inventory as equipment available to Yemeni parties on the battlefield. On April 8, 2016, ArmedConflicts.com places a destroyed T-55M1 near Taiz University after the area changed hands from Houthi control to Yemeni National Army forces.
Sources: CTC Houthi War Machine, Oryx Pre-War Yemeni Fighting Vehicles, ArmedConflicts T-55AM1
Battlefield role
The documented Yemen role was armored direct-fire support from legacy state stocks rather than a newly supplied modern tank fleet. The T-54/T-55 family entered the conflict as part of the Yemeni Army's inherited armored inventory, and the clearest conflict-specific evidence concerns Houthi-aligned possession or use of T-55M1/T-55AM1 vehicles and combat losses in urban and front-line fighting.
The public source record is strongest for presence, participation, and losses, not for a complete order of battle. Defense Express, citing The Military Balance 2024, later described T-54/55 tanks in government-force holdings and reported Houthi claims to possess T-55s, showing that the family remained part of Yemen's armored landscape after the main 2015-2018 campaign period.
Sources: Oryx Pre-War Yemeni Fighting Vehicles, ArmedConflicts T-55AM1, Defense Express Yemen Forces