During the Spectre Rebellion, he took part in a mission to Korhal Palace under the command of fellow spectre Gabriel Tosh. The mission was to assassinate Arcturus Mengsk. During the operation Sloan began to feel the effects of terrazine feedback, and was subdued by Tosh. Sloan later engaged in battle with the Terran Dominion ghosts defending Mengsk, killing the group and capturing two. However, Agent Nova Terra warded away the spectres from their assassination mission, but Sloan survived the operation.