They rode trails a foot wide alongside a 1,000 feet ( 300 m ) cliff , sometimes at night .
The Afghan horses were all stallions and tended to fight each other , even with the soldiers on their backs .
soldiers rode trails a foot wide alongside a 1,000 feet ( 300 m ) cliff , sometimes at night .
The Afghan horses were all stallions and tended to fight each other , even with the soldiers on their backs .