Timeline challenge

Place the events in chronological order, from oldest to newest.

1 First group of U.S. prisoners of war returns home

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2 The Bien Hòa dioxin remediation project begins

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3 Vietnam’s Tenth Party Congress concludes

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4 Việt Minh assault on Nà Sản begins

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5 Generals launch an abortive coup against Nguyễn Khánh

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