Mainland Southeast Asia, also known as the Indochinese Peninsula or Indochina, is the continental portion of Southeast Asia.It lies east of the Indian subcontinent and south of Mainland China and is bordered by the Indian Ocean to the west and the Pacific Ocean to the east. It includes the countries of Cambodia, Laos, Myanmar (Burma), Thailand and Vietnam, …

The region, together with part of South Asia, was well known by Europeans as the East Indies or simply the Indies until the 20th century. Chinese sources referred the region as Nanyang (" 南洋 "), which literally means the "Southern Ocean". The mainland section of Southeast Asia was referred to as Indochina by European geographers due to its location between China and the Indian …

The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural region of the United States that generally includes Arizona, New Mexico, and adjacent portions of California, Colorado, Nevada, Oklahoma, Texas, and Utah.The largest cities by metropolitan area are Phoenix, Las Vegas, El Paso, Albuquerque, and Tucson.