Myanmar, which is also known as Burma and is officially the Union of Myanmar, is the largest country by geographical area in mainland Southeast Asia. Myanmar achieved independence from the United Kingdom on 4 January 1948 as the “Union of Burma”. It became the “Socialist Republic of the Union of Burma” on 4 January 1974, before reverting to the “Union of Burma” on 23 September 1988. On 18 June 1989, the State Law and Order Restoration Council adopted the name “Union of Myanmar”. This was recognized by the United Nations, but not by the US or UK Governments. Myanmar is bordered by China on the north, Laos on the east, Thailand on the southeast, Bangladesh on the west, and India on the northwest, with the Andaman Sea to the south, and the Bay of Bengal to the southwest. One-third of Myanmar’s total perimeter, 1,930 kilometres (1,199 mi), forms an uninterrupted coastline.