stock here: Lasers are particularly good at breaking glass, since they can pinpoint put a huge heat and thus huge stress and cause the fracture. There are thousands of pages of science research on the methods by which constrained or unconstrained glass fractures.
Imagine what they can do with a 400,000W Laser? Thats funny, I just estimated that for a DEW. Lockheed claims 300,000W, LOL, so it probably is 400,000W or even more.
September of 2022
This was estimated to be 150,000 Watts, obviously the Military is not going to announce its exact capability.