an elaborate system of tunnels
The North won and the South lost in both undeclared wars; US Civil War & Vietnam.
the caused great difficulty in fighting in vietnam
agent orange ws shipped from the US into US Bases in Vietnam then they put the agent orange onto the helicopters then they launch the helicopters to spray the agent orange
Ho Chi Minh was the main leader of the communist forces.
The war in Vietnam was similar to the US Civil War because the war involved North Korea versus South Korea.