 Complete the following phrase:  Commanding the 326th Tank Battalion, Brett, now a major, led the first major American tank attack of World War I at the Battle of Saint-Mihiel in September 1918 and, following Colonel George S. Pattons wounding, took command of the 1st Tank Brigade in his absence. Brett received the Distinguished Service Cross for his role in the battle. The Great War came to an end soon after, on 