On March 20, America will be celebrating — if that’s the right word for it — the 15th anniversary of our invasion of Iraq, one of the most well-executed projections of U.S. military might in history. Despite fears that we were underestimating Saddam Hussein’s capabilities (not to mention an elaborate $250 million dress rehearsal during which the team playing the enemy quickly decimated the U.S. fleet), a coalition including American, British, Australian and Polish armed forces managed to seize control of the country within a mere 21 days, with relatively few casualties on either side.