After having been rejected twice, on 26 July 1861, he joined the
Union Army for the
American Civil War, enlisting in the
19th Massachusetts Infantry Regiment. From 1865 to 1867, Greely took part in the post-war occupation of
New Orleans. With the Signal Corps, which also included the
Weather Bureau, Greely was recognized as an expert weather forecaster. The expedition also was commissioned by the US government to collect astronomical and polar magnetic data, which was carried out by the astronomer
Edward Israel, who was part of Greely's crew. Another goal of the expedition was to search for any clues of , lost in the Arctic two years earlier. The expedition sailed on the steamship SS
Proteus. In 1882, Greely sighted a
mountain range during a dog sledding exploration to the interior of northern Ellesmere Island and named it the
Conger Range. He also sighted the
Innuitian Mountains from
Lake Hazen. Greely's party ran into difficulty when two supply parties failed to reach Greely's encampment at
Fort Conger on
Ellesmere Island in 1882 and 1883. His team reached
Cape Sabine expecting to find food and equipment left by the supply ships, but these had not been provided. A rescue expedition, led by Capt.
Winfield Scott Schley on USRC
Bear (a former
whaler built in
Greenock, Scotland), was sent to rescue the Greely party. image of the Greely expedition exhibition at the
Columbian Exposition, 1893 Greely and the other survivors were near death; one died on the homeward journey. They were venerated as heroes, though the heroism was temporarily tainted by sensational accusations of cannibalism, which Greely denied. An exhibition on the Greely expedition was part of the
Columbian Exposition in 1893 and was captured on
stereoscopic images. ==Later career==