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|Class:||Mining World/Fleet Base|
A gas giant, Theta-Garmon V is the star cluster's primary Promethium and Iridium refinery and shipyard. The planet is home to a vast network of shipyards, docks, fortresses, and hydrogen wells. During the Battle of Beta-Garmon in the Horus Heresy Theta-Garmon V was the site of a fierce battle as the Legio Solaria and other loyalist forces stormed the traitor-held orbital network.