Ingame game lobbies Edit
Using the built-in "Internet play" option is still available but players may have a lot of problems regarding the joining of lobbies and occasionally experience in-game crashes.
"GameRanger is an Internet gaming service for (...) Windows computing platforms, developed by GameRanger Technologies. It allows multiplayer games to be played online and provides various social features like chat rooms and voice chat." -Wikipedia
Gameranger supports the reliable hosting of all three American Conquest titles. [Download]