Shackleton was a national hero in England when he began his 3rd Antarctic trip. He had been knighted for his attempt to reach the South Pole between 1907 and 1909 after coming within 100 miles of his goal.
Sir Ernest Shackleton (1874-1922) was an Irish polar explorer who led three British expeditions to the Antarctic in the early twentieth century. He was a junior officer under Robert Falcon Scott during the 1901-1904 expedition to the South Pole. His expedition on the whaler Nimrod in 1907 earned him a knighthood. He detailed his adventures aboard the Endurance during the Imperial Trans-Antarctic Expedition in 1914-1917 in the memoir South.