Blarenberghe executed two scenic paintings of The Siege of Yorktown: in 1784 for the king, Louis XVI, and a near replica in 1786 for the comte de Rochambeau. The detail shown above is from the 1784 painting. Blarenberghe also painted The Surrender at Yorktown (executed in 1785 and 1786) for the same patrons. These works are discussed in volume two of the Rice and ASK Brown work The American Campaigns of Rochambeau's Army 1780, 1781, 1782, 1782 2 vols (Princenton and Providence, 1972).
Blarenberghe was a professional painter of battle and campaign scenes for the French army. He executed his Yorktown paintings under the direct supervision of Berthier, a skilled draftsman and former member of Rochambeau's staff in America (1781-83).
Evidently, one of the changes Rochambeau requested for his version [detail shown below] of the 'Siege' painting was for him to be depicted in a dress blue coat and the more formal red waistcoat and breeches of the French senior officer's uniform. In the 1784 painting, Rochambeau wears the field-dress uniform -- Lighter blue coat [due to the material] and off white waistcoat and breeches, which was more likely. It is upon the 1784 Blarenberghe version [the more creditable] that Augste Couder (1789-1873) based his c.1836 oil painting of the 1781 Siege of the Yorktown (1781), essentially a focused scene of the allied headquarters in front of a staylized tent. It is a detail from Couder's painting that is shown at the top of the Yorktown Campaign webpage.
Links to webpages on Couder's painting and the Yorktown Campaign are given at the bottom of this page.