You're right, but Day of Wrath is a book by William Forstchen. I wasn't implying OUR wrath was coming soon.
Here's the description:
The last sentence nails it.This novella by New York Times bestselling author William R. Forstchen imagines a horrifying scenario where, in the course of one day, the terrorist group ISIS carries out massacres in schools and on highways across the United States. With a surprisingly small but well-organized and ruthless force, the nightmarish devastation brings America to a state of near-paralysis.