The Second German Antarctic Expedition of 1911–1913 was led by Wilhelm Filchner in the exploration ship Deutschland. Its principal objective was to determine whether the Antarctic continent comprised a single landmass rather than separated elements, and in particular whether the Weddell Sea and Ross Sea were connected by a strait. In addition, an extensive programme of scientific research was undertaken. The expedition failed to establish a land base, and the ship became beset in the Weddell Sea ice, drifting north for eight months before reaching open water. The expedition was marred by considerable disagreement and animosity among its participants, and broke up in disarray.
The expedition secured the patronage of Luitpold, Prince Regent of Bavaria, who formed a fundraising committee which organised, among other activities, a public lottery. After leaving Germany early in May 1911, the expedition carried out a thorough oceanographic survey of the Atlantic Ocean before arriving in South Georgia in October. Subsequently, despite being hampered by heavy sea ice, Deutschland penetrated the Weddell Sea beyond the southernmost point reached by James Weddell in 1823. It discovered new land which it named Prinzregent Luitpold Land (otherwise "Luitpold Coast"), and reached the southern limit of the Weddell Sea at the Filchner Ice Shelf. Attempts to set up their land base at a small inlet which they named Vahsel Bay failed when they chose a site on insecure ice which broke away, taking the camp with it. Although much equipment was salvaged, further attempts to establish a land base also failed. By then, Deutschland was unable to escape from the ice, and began its long drift northwards.
During the drift, scientific observations continued, and a brief sledge journey showed that the supposed "New South Greenland", reportedly seen by Benjamin Morrell in 1823, did not exist. Morale had meanwhile collapsed, and by the time the ship was freed and reached South Georgia, the expedition was in considerable disarray. Some members returned to Germany forthwith; Filchner hoped, nevertheless, to reconstitute the expedition and return to Antarctica in the following season. However, he was recalled to Germany to explain the expedition's failure to its backers. In the subsequent inquiry, Filchner was largely exonerated, but had lost his taste for Antarctic exploration, and never went again. The First World War deflected interest from the Antarctic, but in due course the expedition's geographical and scientific discoveries were acknowledged and respected. Filchner did not reveal in his lifetime details of the personal antagonisms that marred the expedition, but a memorandum or exposé, written just before his death in 1957, was published in 1985.