A new government study has found that the total cost of the wars in Iraq and Afghanistan will top $700 billion over the next decade. Already $300 billion has been spent. The total cost estimate comes from the Congressional Budget Office. The San Francisco Chronicle reports this would make the combined campaigns the most expensive military effort in the last 60 years. It is estimated that the Vietnam War cost about 600 billion in current dollars. The Korean War cost about 430 billion in current dollars.