. . . or greatest? It was really hard to pick one to show you; you've got to go to the site.
For more info about how your tax dollars are allocated, see the National Priorities Project.
Coalition military deaths in Iraq since March, 2003: 4,766 (as of April 22, 2011; click here to update). At least 467 contractors have also died, based on only partial information. Total U.S. military wounded as of as of January 14, 2010: 31,882.
Coalition military deaths in Afghanistan since October, 2001: 2,416 (as of April 22, 2011; click here to update.