Yes. In the first episode of the second season of Fear the Walking Dead, we witness the military’s bombardment of Los Angeles. Further revelations in The Walking Dead: The Ones Who Live (2024 The Walking Dead spin-off) indicate that Donald Okafor, a U.S. Air Force officer, bombed Los Angeles (depicted in Fear the Walking Dead) and Atlanta (the aftermath of which is portrayed in The Walking Dead). He was en route to do the same to Philadelphia.
In The Ones Who Live, it was revealed that the Pennsylvania National Guard, having defected from the U.S. military, defended Philadelphia from both the military and the zombies. Okafor, too, defected from the military, switched sides to the Pennsylvania National Guard, and defied orders to bomb the city. Instead, he bombed 4000 Marines poised to retake Philadelphia post-bombardment.
These revelations allow us to deduce that the U.S. military was not only aware of the zombie outbreak’s grave magnitude but also that the U.S. Air Force received directives (presumably approved by the U.S. President) to obliterate entire cities. The U.S. military’s engagement in civilian casualties extends far beyond Los Angeles.