Which of the following describes a major difference between the Vietnam War and earlier wars in American history ? A. American troops were expected to fight alongside foreign allies in a country far from the United States. B. Congress wielded more power over wartime strategy than the presidentdecreasing decision -making efficiency . O A popular antiwar movement emerged among young people after the implementation of the draft . O The war's violence and carnage were extensively televised and covered by investigative journalists .