[parineum]

>The U.S. military maintained and fueled-up all of those tanks and jets for 20 years in Afghanistan and accomplished nothing.

The subsidies aren't protection against this scale of military action. It's a protection against a real war where the enemy has the ability to cut off our international supply lines or where are suppliers themselves are the enemy. This is the exact reason we subsidize corn farms.

It's very analogous to the PPE shortage we just had in the US because we outsourced all of our manufacturing to countries that took first dibs before exporting.

>What is more important, climate change or the fuel supply of tanks?

To the existence of the US government, tanks and airplanes are a more immediate need.