In WW2 we initially had no sources for rubber. It didn’t take TOO long to come up with a substitute, which we still use today.
But we also lost out source of hemp, after the Japanese took the Philippines. My father worked in a factory that made a substitute rope from sisal fiber. Raw, nasty stuff that was weaker and tore at the hands of sailors.
More to the point, after the Allies took Morocco, Germany had no source for nickel. One result was that the valves in their aero engines lasted only a few dozen hours before they had to be replaced. Ditto the turbine blades in their otherwise advanced jet engines. This made a huge difference when it came to winning the air war in Europe.
We have plenty of most of these available in country. The greenie lefties haven’t been letting us mine them.
And the Obama/Biden administration have done “what” to solve this critical problem?
This illustrates one of the reasons why it would be suicidally stupid for any technologically advanced country to adopt the Libertarian’s anti-interventionist platform plank. Because all resources, including many that are strategically essential, are not evenly distributed around the planet (yes, even geology is racist).