What 3 nations saw the vietnam war fighting? why did the u. s enter the fight? was the u. s successful?

Vietnam, Cambodia and laos

The U.S. entered the Conflict in Vietnam to stop the spread of Communism.

Considering that the North Vietnamese defeated and took control of South Vietnam, Thus uniting Vietnam under a Communist banner. I'd say the U.S. failed to halt the spread of Communism in Vietnam, therefore failed

true. earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. this reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. these are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.

the answer is c i just put d and i got it wrong so yeah its d