Multiplay and random map missions add even more opportunities to get some serious play on. Additionally you will come into contact with other powers, such as the Pirates found in the Caribbean campaign. As an added bonus a lot of the buildings and units have the same basic characteristics but totally different names. For instance, most nations call an academy an academy but the Algerians have to go one better and call it a minaret. Although each nation has its own set of units, there are several units available to all nations.
Grenadiers are the elite units of the infantry and are useful for taking out enemy fortifications.
Infantry units can be commanded by an officer and a drummer working together. Once under the command of an officer, a group of units can be commanded as one. This is where that whole 8000 units on a map thing gets a little more convenient. Furthermore, they may assume column, box or square formations. These formations have significant combat bonuses when used correctly.