Slavery ended when President Abraham Lincoln delivered his iconic Emancipation Proclamation. This would eventually free black people so they could become ordinary citizens and NOT slaves. So basically, slavery was ended all thanks to good ol' Lincoln :)
Answer:
Their main intent was to restrict Communist expansion in Indochina as they thought it would soon lead to Communist takeovers in Thailand, Laos, Malaya, and all of what later became Vietnam.
Explanation: This should help