Direct proof of use
The 9K52 Luna-M appears in the 2014 Yemen Civil War through Houthi-aligned use of its FROG-7 artillery rockets. The Washington Institute's 2021 analysis of Houthi missile and drone development states that at least 18 FROG-7 artillery rockets, called Zelzal by the Houthis, were fired at close-range targets in Yemen and in Saudi Arabia's Jizan and Najran border provinces.
That source supports a campaign-level use record rather than a list of individually dated FROG-7 launches. The catalog therefore treats the Yemen record as confirmed Houthi-aligned use of FROG-7/Luna-M rocket artillery, while leaving individual strike attribution to sources that identify specific munitions.
Sources: Washington Institute Houthi Missile Improvements
Timeline
Houthi control of Sanaa in September 2014 and the collapse of the transitional government placed former Yemeni state missile stocks at the center of the war. Jamestown reported that Yemen's missile brigades held older FROG-7 rocket-artillery systems before the Saudi-led intervention, while coalition airstrikes in March and April 2015 targeted missile storage and mobile systems.
The Washington Institute describes the FROG-7 launches as part of the Houthis' initial missile and rocket inventory, which it says was expended by 2017 after the 2015 Saudi air campaign had removed some longer-range missiles from the arsenal.
Sources: Jamestown Houthi Missiles, Washington Institute Houthi Missile Improvements
Narrative
The Luna-M was not a new Houthi-built missile system. It was a Soviet-era artillery rocket system that remained in Yemen's legacy missile inventory. Jamestown places FROG-7 systems among the Yemeni military's prewar missile assets, and The National later described the Soviet-era FROG-7 as part of the Houthi missile arsenal under the Zelzal name.
In the Yemen war, the supported role was short-range ballistic rocket fire by Houthi-aligned forces. The cited direct-use source says the rockets were fired at targets inside Yemen and across the Saudi border in Jizan and Najran, making the Luna-M/FROG-7 record part of the wider Houthi missile campaign rather than a single documented battlefield incident.
Sources: Jamestown Houthi Missiles, The National Houthi Ballistic Missiles, Washington Institute Houthi Missile Improvements