Vietnam, a place where has a lot of widows and orphans since ' The War ' , why , when and what is that ' War '?

The United States of America , a huge land and also the strongest country nowadays , but why many a lot of subjects of the Hollywood movie contains the idea of that ' War '?

These are all due to a tragedy of the named 2 countries which happened 25 years ago. Now, let us to go through the details of this historical event, THE VIETNAM WAR ...

----Winni  & Tammy