What island was nicknamed Ellis Island of the West because it was a major immigrant processing station in the early part of the twentieth century?

Angel Island, located in San Francisco Bay, was nicknamed the "Ellis Island of the West" due to its role as a major immigrant processing station during the early twentieth century. It primarily processed Asian immigrants, particularly Chinese, who faced stringent Immigration laws and lengthy detention. The facility operated from 1910 to 1940 and has since become a historical site, reflecting the complex immigration experiences of that era.