The Obusier de 15 cm Valée, was a French Artillery 6-inches howitzer belonging to the Valée system (French:"Système Valée") of artillery developed between 1825 and 1831 by the French artillery officer Sylvain Charles Valée.Elements of Military Art and History by Nicolas Édouard Delabarre-Duparcq, p.146-147
Specifications The Valée system consisted in various technical improvements to the Gribeauval system. The system mainly improved the mobility of the artillery train, and simplified maintenance by standardizing limber usage and wheel size, and reducing the number of carriage types to two. It also allowed for cannoniers to be able to sit on the ammunition chests of the battery itself during transportation, allowing the whole artillery train to move as fast as the infantry or cavalry.
Valée also improved the guns themselves slightly, by making them lighter, and with a longer range.Systeme An XI and the re-design of the French Artillery. by Paul L Dawson BSc Hons FINS
The complete Valée system consisted in siege guns of and , and field guns of and . It also included field howitzers of and , and a siege howitzer of . Mountain artillery pieces were of caliber. Mortars were of , , and , with a stone mortar.
Deployment French artillery would be reorganized along the Valee system in 1827. Napoleon's Artillery Legacies: France, 1815-1914 - Page 69 by Kenneth N. Jassie The "Valée system" would be used at the Capture of Alger (1830) and the Fall of Constantine (1837), as well as during the Crimea War (1853–1856).
An American version of the Valee system was also developed. Some pieces are visible at the Concord Battery, Concord, Massachusetts.US Field Gun Carriages—Their History and Evolution by Matthew C. Switlik
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