The USS San Diego (CA-6) was a heavy cruiser of the United States Navy, commissioned in 1931. It was the lead ship of its class and played a significant role during World War II, participating in numerous battles in the Pacific Theater. The ship was equipped with advanced weaponry for its time, including 8-inch guns and anti-aircraft defenses. Throughout its service, the USS San Diego earned several battle stars for its contributions to naval operations. It was involved in key engagements such as the Battle of Guadalcanal and the Battle of Leyte Gulf. The cruiser was decommissioned in 1946 and later scrapped.