Holding the rank of Captain, she was the highest-ranking Marine officer aboard HMS Nike to survive the First Battle of Hancock, as both Lieutenant Colonel Klein and Major Flanders were killed in action. Captain Tyler did a good job as acting CO in Honor Harrington's opinion. The Admiralty was in no hurry to relieve her or even to replace the other Marine casualties while Nike was being repaired. Tyler was eventually relieved by Colonel Tomas Ramirez, and was part of honor guard for Captain Michelle Henke, Nike's former executive officer, when she left the ship to take command of HMS Agni.