US soldiers check out of Afghanistan
30 January 2014 Last updated at 07:46 GMT
Afghanistan will be holding presidential elections in 2014, and by the end of the year all foreign combat troops should have left the country.
It is a huge logistical challenge with thousands of troops and large equipment to transport.
David Loyn reports from a transit base at Manas, in Kyrgyzstan, as some personnel board a plane home.