Dressing, feeding, arming, and medicating World War I soldiers cost about two billion dollars.
Discovering what the economic cost of World War II was and how it was financed by each country.
How the more than 200 million dollars spent by the United States in the Vietnam War.
The war in Afghanistan has been going on for 40 years and it doesn't seem to be nearing an end.
The violence in Iraq has lasted more than a decade and has cost the US more than $3 billion.
After September 11, the United States government spent millions on the war on terror.
