The ReProBu, short for the Imperial Resource Procurement Bureau, functioned as a division of the Galactic Empire. This bureau's responsibility involved locating and managing the creation of essential raw resources for the Empire's needs.
Not long after the Battle of Yavin, Alliance spies operating inside the ReProBu leaked intelligence. This information revealed that the Empire was manufacturing six hundred tons of alantium at an Imperial mining complex situated on the planet called Alabash. Consequently, Reekeene's Roughnecks sent Green squad to sneak into the mining complex. They used fake identitags that portrayed them as ReProBu inspectors. Furthermore, they altered the identifying marks on their vessel, the Long Shot, to support their false identities.
Major Stipling was an employee of this Bureau. His duty was to locate raw resources to fuel the Imperial war effort.