"Cossacks II: Napoleonic Wars is the fourth computer game in the Cossacks series of real-time strategy games, released in Spring 2005 to mixed reviews. This game focuses exclusively on the Napoleonic era, meaning it has a much shorter time span than others in this series, which spanned several centuries. Therefore, fewer technologies can be researched than in other Cossacks games, and there aren't as many different unit types for each country as before. On the other hand, Cossacks II allows a large number of units to be trained and it has many tactical options and an updated graphical engine.
The Cossacks series has always been noted for having a large number of units on screen simultaneously, and that all are controllable at the same time; this game is no exception. The limit of soldiers that can be used at the same time is 64,000, a large number, compared to other real-time tactic video games. Only The Total War series can come close to this number, with ten thousand being the maximum number of soldiers usable at a time."
Source: Wikipedia, "Cossacks_2," available under the CC-BY-SA License.