Japanese air attacks on the Mariana Islands and anti-aircraft guns shot down about 37 Japanese aircraft during these raids. After the Marianas began to come under attack, the United States military stepped up its raids on the Japanese-held islands which could be used to launch raids on the B-29 bases. Particular attention was given to Iwo Jima, as it was correctly assumed that the Japanese aircraft which attacked the Marianas were flying from Japan and staging through the island en route to their targets. Following the first raid against Saipan in November, XXI Bomber Command B-29s were dispatched against Iwo Jima's airfields on November 5 and 8.
South Georgia and the South Sandwich Islands groups, while the southernmost make up Southern Thule. The three largest islandsSaunders, Montagu, and Bristollie between the two. The Islands' highest point is Mount Belinda () on Montagu Island. The South Sandwich Islands are uninhabited, though a permanently manned Argentine research station was located on Thule Island from 1976 to 1982 (for details, see above). Automatic weather stations are on Thule Island and Zavodovski. To the northwest of Zavodovski Island is the Protector Shoal, a submarine volcano. The South Sandwich Islands from north to south are: A series of six passages separates each of the islands or island groups in