USA did make many bombing campaigns against North Vietnam, which only alienated the population but could not degrade the fighting force of the Vietcong. ... Support of China /USSR: One of the most crucial reasons for the defeat of the USA was the unflinching support of China and the Soviet Union to the North Vietnam.
The history of the Roman Empire can be divided into three distinct periods: The Period of Kings (625-510 BC), Republican Rome (510-31 BC), and Imperial Rome (31 BC – AD 476).
