I found this fun site that has a few different Viet Nam trivia games that will let you test your knowledge on the country and its history.

Some sample questions are:

* Let's start out easy, what city is almost at the center of Vietnam's coastline
* Where did the Vietmanese defeat the French, thus securing their independence?
* Guerillas of the Vietcong had especially strong holds on the mountain provinces in southern Vietnam, what is this region's name?
* What is the official name of Vietnam?
* Which continent does Vietnam lie in?
* What form of government does Vietnam have?
* What is the capital city of Vietnam?
* What is the official language of Vietnam?
* 67% of the Vietnamese are Buddhist. What percentage of the population are Roman Catholic?
* What is the population of Vietnam?
* Vietnam's Communist leader Ho Chi Minh was also known by a nickname. What was it?
* Whereabouts in Vietnam would you be if you were on the Perfume River?
* Rumour has it that the government made televisions affordable for even the poorest of its citizens to what purpose?
* A giant statue of Ho Chi Minh stands by the river in which of these places?
* The three-wheeled bicycle rickshaw seen throughout Vietnam is known as a what?
* In which month is the Tet festival generally held?
* Which of the following animals cannot be found in Vietnam?
* If you wanted to get new clothes made which part of Vietnam is most famous for this?
* Which of these is a Mekong speciality dish?
* Its official name is Ho Chi Minh City but by what name was Vietnam's second city formerly known?

I started with the easy level quiz and some of the questions were a little too easy :) "What is the language spoken in Viet Nam?" ... come on! But the ones about population density stumped me. I got a 7 out of 10, but didn't do as well on the harder ones. Have fun playing!