Choose your side. The game notes that the Russian campaign is intended to be played after the American one.
The intro voiceover is accompanied by sketches that are scribbled, line by line, into this notebook - drawn by main character John Macmillan.
Macmillan meets up with a couple of other soldiers and they explore the surroundings, meeting one of their distant ancestors on the way.
At the end of each mission, you can allocate experience points to increase soldiers' skills in different areas.
Attacking an enemy encampment without sufficient firepower. Characters can die and will not be replaced. It's only 'game over' if Macmillan himself bites the dust.
A better strategy - Avoiding the main camp and hitting this outpost allows us to capture a couple of tanks!