Direct proof of use
The Aquitaine-class frigate Languedoc was used in the 2011 Syrian Civil War during the night of 13-14 April 2018, when U.S., UK, and French forces struck Syrian government chemical-weapons-related facilities. A U.S. Department of Defense briefing identified Languedoc in the Eastern Mediterranean as firing three naval-version SCALP missiles, and described the second Him Shinshar target west of Homs as receiving three naval cruise missiles as part of a 22-weapon coalition attack.
USNI News separately reported that the French Navy released footage of Languedoc firing three naval-variant SCALP land-attack cruise missiles. A French Navy magazine account by Languedoc's commanding officer described the ship's crew as participating in retaliatory strikes against the Syrian government's clandestine chemical arsenal and firing a salvo of MdCN naval cruise missiles, making Languedoc the first French Navy unit to use the weapon in combat.
Sources: DoD Syria Strike Briefing, USNI Syria Warship Strike Report, Cols Bleus Languedoc Hamilton Account
Strike context
France framed the intervention as a coalition operation with the United States and United Kingdom against Syrian regime facilities connected to chemical-weapons production and employment. The strike followed the 7 April 2018 Douma chemical-weapons allegation; the OPCW Fact-Finding Mission later reported reasonable grounds that a toxic chemical containing reactive chlorine was used in Douma, while noting that the FFM mandate did not identify the responsible party.
Within the coalition package, Languedoc's three ship-launched missiles were part of a larger mix of U.S. Tomahawk and JASSM weapons, British Storm Shadow missiles, and French air-launched SCALP missiles. U.S. officials assessed that coalition missiles reached their assigned targets and that Syrian air-defense launches were largely ineffective.
Sources: French Syria Intervention Statement, OPCW Douma FFM Report, DoD Syria Strike Briefing
Operational role
Languedoc's documented role was long-range naval land attack, not patrol presence or transfer. The ship used the Aquitaine-class FREMM's vertical-launch cruise-missile capability to contribute to a one-night strike against fixed facilities west of Homs from a maritime launch position in the Eastern Mediterranean.
Defense News, citing a French Joint Staff spokesman, reported that a different French multimission frigate failed to fire an intended salvo and that Languedoc launched as the backup ship under France's redundancy plan. The same report described the strike as France's first combat firing of its naval cruise missile and listed Aquitaine, Auvergne, and Languedoc as the three French multimission frigates deployed for the mission.
Sources: DoD Syria Strike Briefing, Defense News French Backup Launch Report