Before the events of 9/11, Central Asia was not a priority in U.S. grand strategy. After, when counterterrorism became the top priority for U.S. diplomacy, Central Asia grew in importance for Washington. The U.S. military presence in Central Asia not only has an important impact on the strategic pattern of Central Asia, but also has global strategic significance. The Iraq War has made the United States’ overseas front longer, sparked the resurgence of terrorism in Central Asia, and the Bush administration’s active support of “democratic transformation” and “color revolutions” have also made the United States’ Central Asia policy face severe challenges.