 He remained stationed there for the rest of the war, and married a local woman.He was in command of the VIII Corps from September 28, 1863 – October 10, 1863, succeeding Robert C. Schenck.During the Battle of Monocacy in July 1864, Tyler commanded two regiments of inexperienced Hundred Days Men that successfully held off numerous Confederate attempts to capture the Jug Bridge on the Baltimore Pike.