(from wikipedia) The Second Franco-Mexican War (1861–1867), was a military invasion of the Republic of Mexico by the French Empire of Napoleon III, purportedly to force the collection of Mexican debts in conjunction with Great Britain and Spain. Mexican conservatives supported the invasion, since they had been defeated by the liberal government of Benito Juárez in a three-year civil war. Defeated on the battlefield, conservatives sought the aid of France to effect regime change and establish a monarchy in Mexico, a plan that meshed with Napoleon III's plans to re-establish the presence of the French Empire in the Americas. Although the French invasion displaced Juárez's Republican government from the Mexican capital and the monarchy of Archduke Maximilian was established, the Second Mexican Empire collapsed within a few years.
There is some interest in Belgium for this conflict, as the empress was the Belgian Princess Charlotte, known in Mexico as Carlota. As Belgum was a neutral state, sending regular troops was prohibited, but a Belgian Legion of volonteers was formed of about 4.000 men it saw action in some battles with varying success. With the withdrawal of the French troops in 1866, most of the Belgian troops also returned to Europe.
The first pictures are from the Imperial army
The first figures are painted as Cazadores de Mexico ( 1866 -1867)
Hereunder privates from the Imperial Amry (1866 - 1867)
Next a Jäger of the Austrian Legion (1865)
Next are figures from the Federal Army
Line Infantry private ( 1866 -1867)
privates of the 2nd Morelia Btn of the national Guard (1863)
These 3 figures are Federal line infantry (1856 - 1863)
Next a State militiaman (1863 - 1867)