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Photos taken at Versailles between 1862 and 1868 (probably taken in 1862 or 1863). Many of these artillerymen were veterans of the Crimean War and/or the Franco-Austrian War (Italian Campaign of 1859).
Part of one of the two regiments of artillery of the French Imperial Guard: link
Artillerymen of the French Imperial Guard during drill: link
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Cuirassiers, without the cuirasses, at Versailles. Photo taken between 1860 and 1870 (probably taken between 1860 and 1865): link
These are not cuirassiers of the Imperial Guard. They are cuirassiers of the line.
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Lieutenant of the 1st Regiment of Cuirassiers of the French Imperial Guard (photo taken between 1854 and 1860).