Dutton says Ben Roberts-Smith ruling a 'tough day for our country', while Taliban claims foreign forces carried out 'uncountable crimes'

Ben Roberts-Smith was awarded the Victoria Cross in 2011.  (Department of Defence: Corporal Chris Moore)

Opposition Leader Peter Dutton says the court ruling against decorated war veteran Ben Roberts-Smith was a "tough day for the country" and believes there has been a "significant culture change" at the Australian Defence Force.

"I think it's a tough day for our country to be honest," Mr Dutton told the Nine Network on Friday morning.