Warfare in the late 1800s differed significantly from that in the early 1800s. The technological advances in explosive artillery, rifling, mass production, and railroads enabled armies to move faster with greater firepower. The battle of Worth resembled a WWI battlefield more than a Napoleonic one.

North German Confederation
Frederick William
75,000 Infantry
6,000 Cavalry
300 Guns

France
Patrice de Mac-Mahon
32,000 Infantry
5,000 Cavalry
100 Guns

Wargame

Rules for this period are tough to find. Potentially American Civil War rules or Blue Bonnets and Tricornes.

Models Needed
25 Regiments of Germans, 10 Regiments of Cavalry, and 15 Gun Batteries
18 Regiments of French, 10 Regiments of Cavalry, and 5 Gun Batteries

For the Terrain, standard mid German terrain, fields, some boccage, small rivers and creeks, maybe a hill.

The French army should be deployed as one, whereas the Germans should be spread out throughout the area. However, when a German infantry unit is destroyed, then a new unit should be sent in from reserves.

The French should aim to inflict more damage on the Germans, while the Germans must consolidate their forces to achieve victory over the French.