Australian soldiers who have served in Afghanistan could be discharged from the army for posting racist comments and videos on Facebook.

After a 7News investigation has uncovered the commentary, the Acting Chief of Army deemed the behaviour of the soldiers as 'disgusting' saying it goes against proper military training.

The video depicts soldiers shooting guns and detonating explosives, destroying a bridge, in Afghanistan.

Once posted on Facebook Australian Defence Force soldiers have been found making obscene and racist comments on the footage, mocking the people they have been sent to help.