Their attack--during the Tet holidays--failed to achieve its principal objectives.
It did not collapse the elected government of South Vietnam or shatter its army--as the Communists had hoped.
It did not produce a "general uprising" among the people of the cities as they had predicted.
The Communists were unable to maintain control of any of the more than 30 cities that they attacked. And they took very heavy casualties.
But they did compel the South Vietnamese and their allies to move certain forces from the countryside into the cities.
They caused widespread disruption and suffering. Their attacks, and the battles that followed, made refugees of a half a million human beings.