The Battle of Mill Springs in January 1862 saw 4,400 Union troops turn back nearly 5,900 Confederates. Union casualties amounted to 40 killed, 207 wounded, and 15 missing; Confederate losses amounted to 125 killed, 309 wounded, and 95 missing. The Confederacy’s most significant casualty was General Felix Zollicoffer, the first southern General killed in action. Reportedly, he died after wandering into Union ranks, thinking they were his own men.