'The Deluge' is a multiplayer mod set in 17th century Europe. It offers historically accurate factions, troops and equipement, many improvements to gameplay and tactics, tons of new models/textures, a lot of unique features (eg. animated flora and banners, working cannons, boats and ferries, building defences) and much, much more...
The Deluge introduces useful in-game console command system. Here's a list of available commands - both for server admins and common players.
List of most frequently asked questions. It's best to start from here.