Gun in hand, 55-year-old Dost Mohammad Salangi recites poetry as he leads a small group of men to a look-out post high in the rugged hills of Parwan province, north of the Afghan capital Kabul.

Heavily bearded and wearing a traditional circular pakol hat to keep off the sun, he has a warning for the Islamist militant Taliban movement, which has increased attacks on Afghan forces and claimed more territory as foreign troops withdraw.

Salangi is one of hundreds of former "mujahideen" fighters and civilians who have felt compelled to take up arms to help the army repel a growing Taliban insurgency.