Grievous damage or havoc.
Depredation or devastation
the ravage of a lion; the ravages of fire or tempest; the ravages of an army, or of time
To devastate or destroy something.
To pillage or sack something, to lay waste to something.
To wreak destruction.
Harsh damage.
The ravages of war decimated the country: death, destruction and pestilence resulted from the bombings.