The U.S. Army Drawdown in Afghanistan Is Being Obstructed by Customs Agents

From the Washington Post:

An escalating dispute between the Afghan government and the United States over customs procedures has halted the flow of U.S. military equipment across Afghanistan’s borders….The Afghan government is demanding that the U.S. military pay $1,000 for each shipping container leaving the country that does not have a corresponding, validated customs form. The country’s customs agency says the American military has racked up $70 million in fines.

Wait a second. We invaded Afghanistan. Has there ever been a war in history where an invading army had to pay customs duties when it decided to leave? Surely this is a first?