Sienar Test Facility 73 defense battalion

A defense battalion was established to protect a Sienar Fleet Systems-controlled test facility on the snowy company-owned world of Sienar TF73. The battalion was assigned to Test Facility 73 to protect any Imperial secrets within from escaping and, therefore, made breaking into the facility near-impossible. Its members included stormtroopers and their range trooper variant. In 4 BBY, rebel agent Cassian Jeron Andor managed to infiltrate the facility despite the battalion's presence in order to steal the TIE Avenger prototype.

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