After awakening feeling at peace, he was close to pulling a Rhyn and decimating the world around him in an explosion of raw fury.
Damian would've exploded by now, probably decimating everything in the vicinity.
He retaliated by decimating the army.
Again, it must have been the pestilence decimating Milan in1484-1485which gave occasion to the projects submitted by Leonardo to Ludovico for breaking up the city and reconstructing it on improved sanitary principles.
The war had wreaked havoc on Europe, decimating its male population and economy.