Could prosecuting Ben Roberts-Smith restore some ethical norms?

The news that Ben Roberts-Smith will face multiple war crime murder charges should be celebrated; This is not only because the upcoming trial may provide some measure of justice for the long-suffering people of Afghanistan, but also because the trial of a once-famous soldier reinforces the shaky ethics that liberal nations once took for granted.

That is, norms associated with institutions and agreements such as the United Nations, the International Court of Justice and the Geneva Convention, which provide the basis for human rights even on the battlefield.