What is the theme in A Vietcong Memoir: An Inside Account of the Vietnam War and Its Aftermath by Truong Nhu Tang?

The desire for an independent government and freedom from governmental oppression is among the main reasons The National Liberation Front is formed at all and the reason those involved are willing to continue giving of themselves and their time. This quest is so important to many that they are willing to make huge sacrifices. Not only are their own lives in constant danger through the constant threat of attack by United States military, many of them literally give up their families and/or lose family members.