I'd also have really liked a way to select all of a specific type of enemy units during multiplayer.

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Meier said there are many concepts that work really well in a computer game, like fog of war -- not being able to see all the pieces on the board until your units are within range of enemy units.

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The tribesmen attacked the enemy with small, highly mobile units, forcing it to defend itself along a huge front.

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"As we encounter enemy formations on the move, I can also identify those enemy formations, type in what size, activity and location of those formations and send those messages up, " Linnington said, adding that it reduced the risk that other units would encounter the enemy inadvertently.

CNN: Technology links 101st on the battlefield

The units, dubbed "Churchill's Secret Army", were set up to relay vital information about enemy movements and help mount counter-attacks as Britain braced itself for occupation.

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The system can keep track of both friendly forces and the enemy, and allows troops to communicate by e-mail -- a feature that could come in handy if units have radio failures or move out of transmission range.

CNN: Technology links 101st on the battlefield