Lots of explosives on critical infrastructure like bridges and tunnels. I just looked it up and it looks like they removed the last of them a few years ago so it's no longer a thing.
Anyways, besides nuclear deterrence, a suicide pact is about the only thing I could think would work as defense against a major global military power.
Anyways, besides nuclear deterrence, a suicide pact is about the only thing I could think would work as defense against a major global military power.