A temperate planet, Ghorman was the site of the Ghorman Massacre, an early atrocity committed the Empire shortly after its formation. In 18 BBY, an anti-tax demonstration by the Ghorman citizens ended in tragedy when Wilhuff Tarkin purposefully landed his ship on top of the crowd of peaceful demonstrators, killing and injuring hundreds.[4]
The members of the former Delegation of 2,000 were spurred by the Ghorman Massacre to begin plotting open rebellion against the Empire, plans which would culminate in the formal creation of the Alliance to Restore the Republic some seventeen years later. As a result of his action, EmperorPalpatine promoted Tarkin to the rank of Admiral.
An Imperial base was later established on Ghorman. An Imperial freighter convoy consisting of 3 BFF-1 bulk freighters called Century 1, Century 2, and Century 3 was en route to the new base and had already rendezvoused with a TIE Fighter escort when the Rebels deployed a Y-wing along with an R-22 Spearhead from Red Squadron to attack the convoy. The R-22 held off the attacking TIEs while the Y-wing destroyed the convoy. The loss of necessary supplies managed to delay the completion of the outpost for an entire year. The Rebels later recreated the mission as a simulation for training new pilots.