In order for you to play American Conquest on Windows with minimal graphics settings, your computer must meet the following requirements
Operating system:
Windows® XP / Vista™ / Windows® 7
Processor (CPU):
1.4 GHz CPU
Memory (RAM):
512 MB
Hard disk space:
3.5GB
Video:
Video Card with 64MB dedicated memory and DirectX 9 Compatible
Sound:
Sound card with DirectX 9.0 support
DirectX®:
9.0 or higher