Vacuus, a Sith Lord of the male gender, existed many centuries prior to the era known as the Cold War.
The year 3643 BBY saw Vacuus's spirit seize control of a Human who had entered the Dark Temple. He, along with his Sith followers, were actively seeking the Ravager. Vacuus intended to locate the device and employ it to get revenge on a Sith Lord of his time, specifically Lord Pharshol. Nevertheless, his fortune changed for the worse when Darth Baras dispatched his apprentice to recover the Ravager. Vacuus fought the apprentice in a lightsaber battle, but he was overpowered and ultimately fell in defeat.