Thousands of Afghan National Army (ANA) soldiers have deserted the fledgling service after completing training given by instructors from the United States, France and Britain, defence ministry officials said Sunday.
"Some 3,000 ANA soldiers have fled the army," ministry spokesman General Mohammad Zahir Azimi said.
"The defence ministry has announced that they have to come back and join the army otherwise they will have to pay for all the expenses spent on their training."
The desertions are a serious blow to the nascent ANA which numbers around 10,000.
Even though it is forecast to grow to about 70,000-strong, its numbers are small in comparison to the 100,000 armed militia currently being disarmed and demobilised by government authorities.
Tough training, low wages and factional links to the private militias which still control wide swathes of the country outside Kabul are believed to be behind the mass exodus from the ANA.
It is not known how much money has been spent on the deserters but recruits receive 50 US dollars a month during training and a minimum wage of 70 dollars per month after that.
In addition to their imported uniforms and tuition, soldiers receive a seven dollar a day food allowance and 60 dollars a month if they go on exercises outside the capital Kabul.
The ANA was formed in mid-2002 after the ousting of the Islamic fundamentalist Taleban regime by US-led forces.