The affirmation is correct.
The Tet Offensive was the turning point in the Vietnam War. The number of defeats during this war is terrible. It was one of the bloodiest wars in history, and one that took a particularly high toll of civilian lives:
- 58,000 US soldiers died and 304,000 wounded
- the Vietnamese army loses one million and a half of people.
Also, the country was devastated by years of chemical warfare. Billions of dollars were wasted. Thousands of acres of forest were destroyed. For Vietnamese, it meant generations of deformed babies, miscarriages, cancers and all manner of illnesses.