According to the Military Times Hall of Valor, "on 3 May 1863, while serving with Company B, 47th Ohio Infantry, in action at Vicksburg, Mississippi. Private Hack was one of a party which volunteered and attempted to run the enemy's batteries with a steam tug and two barges loaded with subsistence stores." Hack and nine others in Company B did this while Confederate States Army batteries were shooting at them "under cover of darkness" Hack was awarded the Congressional Medal of Honor "for extreme bravery under fire" on January 3, 1907.