From the readme:

Recommended system specifications:

• CPU: 1.8 GHz or faster Intel Pentium IV or AMD Athlon processor

That's for a strategy game.

And now to compare I'll quote the readme of a recent FPS (Unreal II):

1.2 Recommended System Requirements
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Operating System: Windows 98/Me/2000/XP

Processor: Pentium III or AMD Athlon 1.2 GHz (or higher)