Answer:
He became a Brigadier General at the Siege of Petersburg in 1864. On June 18 at Rives Salient he was shot in the right hip and groin. Determined to keep his troops from retreating he pulled out his sword, which he used to keep himself standing for a couple minutes until he eventually fell unconscious due to blood loss. The surgeon he was brought to predicted he would die. So on June 19, Major General Gouvernour K. Warren went to Lieutenant General Ulysses S. Grant to tell him of Chamberlain's wish before he died to "receive recognition of this services by promotion for the gratification of his family and friends." However he survived and served until the end of he war and eventually died February 24, 1914.