Direct proof of use
REVA mine-resistant ambush-protected vehicles are documented in the 2014 Yemen Civil War through reporting on the UAE-led campaign against al-Qaeda in the Arabian Peninsula in southern and eastern Yemen. War on the Rocks reported that the United Arab Emirates armed the 1,500-strong Hadramaut Tribal Confederation and mounted that rural tribal force in Caiman and Reva MRAPs during the coalition buildup against AQAP.
The Washington Institute separately described the same al-Mukalla campaign force structure: about 1,500 Hadramawt Tribal Confederation fighters were part of a larger 10,000-strong force developed to retake the city, and coalition air and naval fires preceded ground operations that began on April 23, 2016. That source supports the campaign and operator context, while the War on the Rocks account directly identifies the REVA vehicles.
Sources: War on the Rocks UAE Counterinsurgency, Washington Institute AQAP Campaign
Timeline
The vehicle evidence sits inside a 2015-2016 sequence. CFR places the start of the current civil war in the 2014 Houthi takeover of Sanaa and the March 2015 Saudi-led intervention. In September 2015, Oryx listed Reva under Yemen's pre-war MRAP inventory and framed the list as equipment in Yemeni Army service before the Houthi takeover that could be available to battlefield parties after the split.
By April 2016, the UAE-led anti-AQAP effort in Hadramaut had reached al-Mukalla. The Washington Institute reported that airstrikes and naval gunfire began on April 18 and that ground operations to recapture the city and nearby port and military bases began on April 23. War on the Rocks, published the following month, identified the Hadramaut Tribal Confederation as mounted in Caiman and Reva MRAPs.
Sources: CFR Yemen and Red Sea Tracker, Oryx Pre-War Yemeni Fighting Vehicles, Washington Institute AQAP Campaign, War on the Rocks UAE Counterinsurgency
Battlefield role
In Yemen, the REVA's documented role was protected mobility for coalition-aligned local forces rather than a stand-alone fire-support or strike system. War on the Rocks described the Hadramaut Tribal Confederation as a rural tribal force armed by the coalition and mounted by the UAE in MRAP vehicles, while the broader article placed those local units inside the southern and eastern Yemen campaign against AQAP.
The available public record does not establish a vehicle count, REVA variant, or incident-by-incident firing record. It does support a narrower claim: REVA MRAPs were fielded by UAE-backed Hadramaut Tribal Confederation forces during the 2016 campaign against AQAP around Mukalla, with Oryx adding that Reva vehicles also appeared in the pre-war Yemeni Army equipment pool.
Sources: War on the Rocks UAE Counterinsurgency, Oryx Pre-War Yemeni Fighting Vehicles, Washington Institute AQAP Campaign