Mosul - The liberation of innocent civilians. Hard military assault by army, artillery, airstrikes on enemy positions results in unfortunate but necessary civilian collateral damage. Bombardment of civilian areas, and deaths caused, is justified in order to achieve a speedy end to the campaign.
Aleppo - An attack on innocent civilians. Hard military assault by army, artillery, airstrikes on schools, hospitals, orphanages, children's zoos and cute puppies result in criminal civilian death and injury. Bombardment of civilian areas, and deaths caused, is unjustified and a war crime
White Phosphorus - Use by Iraqi and US forces assaulting Mosul to provide smokescreens is necessary to save friendly soldiers lives. Collateral damage to innocent civilians including appalling burn injuries is regretted.
White Phosphorus - Use by Syrian and Iranian forces assaulting Aleppo is a war crime using prohibited substances and can never be justified.
USAF / RAF airstrike on wedding party - An unfortunate case of target misidentification of a gathering at which known terrorists were known to be present. Collateral damage is regretted.
Russian Air Force airstrike on wedding party - The deliberate targeting of innocent civilians by overwhelming military force. A war crime, without doubt.
Use of Mustard Gas on civilians by US/Iraqi forces - An over-zealous recourse to emergency munitions by a commander fearing for his safety. Use of banned substances and civilian collateral damage is regretted
Use of Mustard Gas on civilians by Syrian Army - A calculated war crime using prohibited gas against innocent civilians.