Supplies to our military must remain within the continental US obviously. If we were to become engaged a WW we must be self sufficient.
This is an interesting article on an aspect of logistical supply. It goes into detail of the acquisition and assembly, not technical but logistical. The example illustrates a vulnerability we should not have.
Example:
Primers
...
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Despite the chemicals having origins outside of CONUS, ATK has not identified any of these chemicals as presenting a supply problem for the formulator.22 However, we find potential issues with the countries of origin for some of the identified chemicals. These potential issues are primarily political in nature. Although trade agreements do exist with China, India, and Brazil, these countries may become trade adversaries in the future.
An adversarial relationship may very well become a reality in light of the growing protectionist policies enacted by Congress. Recently, a minor trade disagreement between the United States and China began over an increase in the tariff on tires imported from China.23 Although this measure by the Office of the United States Trade Representative was meant to protect the U.S. tire industry, it pushed China to reciprocate tariff action. Furthermore, obtaining the chemicals found in Mexico may become problematic as the government of Mexico struggles with native indigenous groups, drug cartels, and disillusioned citizens. ...
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