It was because of Luo Ken's request that Taviz discovered War Marshal's attempt to use a Virus Bomb to destroy the Loyalist Interstellar Warriors, which made him commandeer a warship and rush towards the ground, attempting to alert the engaged Interstellar Warriors below.
Upon discovering Taviz's departure, Horus immediately ordered a pursuit, and in that process, Taviz reached the Eisenstein and made contact with Death Guard Seventh Platoon Leader, Garo, who was on the ship at the time.
Although they belonged to different legions, as old soldiers, Taviz and Garo had a good personal relationship, so when Garo realized Taviz was being pursued, he was also taken aback and quickly inquired about his situation. Trusting Garo, Taviz revealed everything without reservation.
Garo was greatly shocked upon hearing about the betrayal by the War Marshal but quickly made a decision, overpowering the warships pursuing Taviz and covering him until he reached Istvan III.