World War I: $253 billion
World War II: $4.1 trillion
Korean War: $320 billion
Vietnam War: $686 billion
Gulf War: $96 billion
Iraq war: $648 billion
Afghanstian/Global war on terror: $171 billion
Post 9/11 domestic security: $33 billion
Post 9/11 operations: $859 billion
[NewsVine]