The Chalice Cluster, also known simply as the Chalice, was a cluster in the Silesian Confederacy consisting of the Willis System, the Hendrickson System, and the Jarmon System.

Governance had been given to Andre Warnecke. He then led the Chalice Cluster Uprising, a rebellion against the Confederacy that resulted in the deaths of over three million people. After fourteen T-months of trying, the Silesian Confederate Navy was finally able to move in and crush the rebellion. (HH6)