How do you host the Colloseum games when playing Age of Empires 3?

In Age of Empires III, hosting the Colosseum games requires you to create a custom game lobby. Select the "Colosseum" scenario from the available options, and then set the game preferences, such as the number of players and rules. Once you've configured the settings, invite friends or other players to join your lobby. Start the game to compete in the Colosseum, focusing on tactics and strategy to emerge victorious.