When it talks of 'invasion', think of it an an 'insurgency' rather than all 'all out invasion'.
A rapid historical run-through of the Gulf of Tonkin Incident.
Watch this and think about the ways in which the TET offensive was a 'Turning Point' in the Vietnam War
Focusing on the background between 1941 and 1963
Ready to 'test' yourself on the whole containment topic?