The Stromma contingent refers to a group of stormtroopers from Stromma who fought for the Empire of the Hand. This force, commanded by both Grand Admiral Thrawn and Stromma Council Liaison Nyama, consisted of multiple Stromma traveling to and from their base. They used several carriers and Nyama's personal shuttle, with their main headquarters located on the Imperial I-class Star Destroyer called the Admonitor.
The novella Crisis of Faith, written by Timothy Zahn and released in 2011, featured the Stromma contingent. It was included in the 20th Anniversary Edition of Zahn's earlier novel, Heir to the Empire, which was published in 1991.