Ho Chi Minh City , also widely known by its former name of Saigon , is the largest city in Vietnam by population.
Wikipedia

Vietnam is a Southeast Asian country on the South China Sea known for its beaches, rivers, Buddhist pagodas and bustling cities. Hanoi, the capital, pays homage to the nation?s iconic Communist-era leader, Ho Chi Minh, via a huge marble mausoleum. Ho Chi Minh City (formerly Saigon) has French colonial landmarks, plus Vietnamese War history museums and the C? Chi tunnels, used by Viet Cong soldiers.
Wikipedia