Many Countries leaders would be tarred with this same brush.

Wars in Yugoslavia, Iraq, Libya, Sudan, Afghanistan, Syria, Yemen .... have been instigated by countries leaders who if we take your definition, should be being tried as war criminals.

Why focus just on Putin, even if you have credible evidence that he has acted illegally - I am not sure on who decides on legality here, and not take the message to the more persistent offenders.

Currently no credible evidence has been offered of an invasion of Ukrainian territory by an external force, either soldiers, tanks, planes ......... .Similarly no evidence has been offered that Russia in controlling an armed force of Russian military in Ukrainian territory, Prussia is bombing Ukrainian territory, Russia is firing missiles into Ukrainian territory.

As opposed to what the crusader coalition is doing in Syria - weapons, soldiers, bombing, missiles, food, medical.........

But keep repeating the illusion Harry/Bsnub and some may believe you.