Group 1 - The U.S. has deployed the second nuclear submarine, "Indiana," to Hawaii this month, following the earlier deployment of the "Toledo" submarine in July [1][3] - The "Indiana" submarine, which arrived at its new home port at Pearl Harbor-Hickam Joint Base on the 22nd, is now the third Virginia-class submarine under the U.S. Navy's seventh submarine squadron [3] - The Pentagon is reportedly enhancing military deployments in the Western Pacific region in response to perceived threats from China's growing military capabilities [4] Group 2 - The "Indiana" submarine, which entered service in 2018, is the 16th Virginia-class submarine and features two large payload launch tubes capable of firing six Tomahawk cruise missiles each, with a range of 1,000 miles (approximately 1,600 kilometers) [4] - The current submarine squadron stationed at Pearl Harbor supports seven fast-attack submarines, including three Virginia-class and four Los Angeles-class submarines [3]