As Sherman' s troops approached Savannah they sorely required supplies. Sherman determined that if he could take Fort McAllister, supply ships could reach him. Thus, he ordered Maj. Gen. O.O. Howard, commander of his right wing, to take the fort. Howard chose Brig. Gen. William B. Hazen to accomplish the task. Hazen, in the afternoon of December 13, had his men in line for the attack. Upon giving the order to attack, his men rushed forward through the various obstacles prepared for them, entered the fort, and captured it. With his supply line open, Sherman could now prepare for the siege and capture of Savannah.