If Egypt's 1956 liberation from colonialism helped end the colonial era, the country may now once again be signalling a change in the global system. When protesters toppled Egyptian president and reliable U.S. client Hosni Mubarak this February, they changed the terms of the U.S.-Egypt relationship. Washington can send all the money and tanks it wants -- it won't be able to dictate to a democratic Cairo any more than it can to, say, Ankara or Paris. The fall of easily controlled dictators across the region (the U.S. has already given up on its man in Yemen) comes at the same time as U.S.-allied democracies and autocracies alike seem increasingly willing to buck Washington's wishes. Last week alone, the U.S. clashed with some of its most important client states. Maybe that's because of America's habit of picking the most troubled states in the most troubled regions as clients (where they're perceived as the most needed), maybe it's because democratic movements are pressuring client states to follow popular domestic will rather than foreign guidance, and maybe it's because the idea of clientalism was doomed from the start. Democracy is on the march, and democratic governments make bad clients: they're fickle; prone to change foreign policy as their domestic policy shifts; and subject to the needs, desires, and whims of their voters.

Whatever the reasons, U.S. client states have been causing Washington more headaches than normal this year, and particularly over the past week. Here are ten of the most closely held U.S. clients, measured in part by foreign assistance (scheduled for fiscal year 2012) and by number of U.S. troops stationed there (according to Department of Defense statistics). Each is labeled with the reason for their strategic importance and with a rough gauge of how much trouble it's been causing the U.S., rated on a scale from "Zero Problems" to "Migraines in Washington." The most extreme cases are labeled "Client Relationship at Risk." Looking over the list of troubled client relationships, it's easy to wonder if the entire Cold War-inspired enterprise could be nearing its end. Maybe Egypt, just as it helped end the centuries of European imperialism in 1956, could make 2011 the year that began the end of clientalism.

Of course, what separates a client state from an ally is a subjective matter. Japan and Germany, despite the thousands of U.S. troops stationed in each, aren't listed -- the two are powerful, wealthy, and democratic enough that the U.S. assumes they will go their own way, which they often do. Israel is listed for its economic, military, and foreign policy reliance on the U.S. Though the long-term U.S.-Israel alliance is built on much deeper and more enduring cultural and ideological ties than any amount of money can buy, the day-to-day is deeply informed by a client-like relationship.

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